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Finding the Fourth Proportional to 519,419.40, 779,129.10 and 488,315.40

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Solution

The fourth proportional to 519,419.40, 779,129.10 and 488,315.40 is: 732,473.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,419.40 : 779,129.10 = 488,315.40 : x
  2. Step 2: Convert to fraction form
    519,419.40/779,129.10 = 488,315.40/x
  3. Step 3: Cross multiply
    519,419.40x = 779,129.10 × 488,315.40
  4. Step 4: Simplify right side
    519,419.40x = 380,460,738,118.14
  5. Step 5: Solve for x
    x = 380,460,738,118.14/519,419.40
  6. Step 6: Final answer
    x = 732,473.10

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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.