Home / 519,421.40-779,132.10-498,426.20

Finding the Fourth Proportional to 519,421.40, 779,132.10 and 498,426.20

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Solution

The fourth proportional to 519,421.40, 779,132.10 and 498,426.20 is: 747,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,421.40 : 779,132.10 = 498,426.20 : x
  2. Step 2: Convert to fraction form
    519,421.40/779,132.10 = 498,426.20/x
  3. Step 3: Cross multiply
    519,421.40x = 779,132.10 × 498,426.20
  4. Step 4: Simplify right side
    519,421.40x = 388,339,851,901.02
  5. Step 5: Solve for x
    x = 388,339,851,901.02/519,421.40
  6. Step 6: Final answer
    x = 747,639.30

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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.