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Finding the Fourth Proportional to 519,426.90, 779,140.35 and 498,431.70

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Solution

The fourth proportional to 519,426.90, 779,140.35 and 498,431.70 is: 747,647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,426.90 : 779,140.35 = 498,431.70 : x
  2. Step 2: Convert to fraction form
    519,426.90/779,140.35 = 498,431.70/x
  3. Step 3: Cross multiply
    519,426.90x = 779,140.35 × 498,431.70
  4. Step 4: Simplify right side
    519,426.90x = 388,348,249,189.10
  5. Step 5: Solve for x
    x = 388,348,249,189.10/519,426.90
  6. Step 6: Final answer
    x = 747,647.55

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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.