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Finding the Fourth Proportional to 514,851.40, 772,277.10 and 425,621.80

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Solution

The fourth proportional to 514,851.40, 772,277.10 and 425,621.80 is: 638,432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,851.40 : 772,277.10 = 425,621.80 : x
  2. Step 2: Convert to fraction form
    514,851.40/772,277.10 = 425,621.80/x
  3. Step 3: Cross multiply
    514,851.40x = 772,277.10 × 425,621.80
  4. Step 4: Simplify right side
    514,851.40x = 328,697,969,400.78
  5. Step 5: Solve for x
    x = 328,697,969,400.78/514,851.40
  6. Step 6: Final answer
    x = 638,432.70

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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.