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Finding the Fourth Proportional to 525,459.40, 788,189.10 and 146,379.40

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Solution

The fourth proportional to 525,459.40, 788,189.10 and 146,379.40 is: 219,569.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,459.40 : 788,189.10 = 146,379.40 : x
  2. Step 2: Convert to fraction form
    525,459.40/788,189.10 = 146,379.40/x
  3. Step 3: Cross multiply
    525,459.40x = 788,189.10 × 146,379.40
  4. Step 4: Simplify right side
    525,459.40x = 115,374,647,544.54
  5. Step 5: Solve for x
    x = 115,374,647,544.54/525,459.40
  6. Step 6: Final answer
    x = 219,569.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.