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Finding the Fourth Proportional to 517,354.20, 780,890.43 and 517,354.20

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Solution

The fourth proportional to 517,354.20, 780,890.43 and 517,354.20 is: 780,890.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,354.20 : 780,890.43 = 517,354.20 : x
  2. Step 2: Convert to fraction form
    517,354.20/780,890.43 = 517,354.20/x
  3. Step 3: Cross multiply
    517,354.20x = 780,890.43 × 517,354.20
  4. Step 4: Simplify right side
    517,354.20x = 403,996,943,700.31
  5. Step 5: Solve for x
    x = 403,996,943,700.31/517,354.20
  6. Step 6: Final answer
    x = 780,890.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.