Home / 809,345.40-1,214,018.10-389,441.40

Finding the Fourth Proportional to 809,345.40, 1,214,018.10 and 389,441.40

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Solution

The fourth proportional to 809,345.40, 1,214,018.10 and 389,441.40 is: 584,162.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,345.40 : 1,214,018.10 = 389,441.40 : x
  2. Step 2: Convert to fraction form
    809,345.40/1,214,018.10 = 389,441.40/x
  3. Step 3: Cross multiply
    809,345.40x = 1,214,018.10 × 389,441.40
  4. Step 4: Simplify right side
    809,345.40x = 472,788,908,489.34
  5. Step 5: Solve for x
    x = 472,788,908,489.34/809,345.40
  6. Step 6: Final answer
    x = 584,162.10

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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.