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Finding the Fourth Proportional to 520,985.60, 779,404.80 and 451,635.20

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Solution

The fourth proportional to 520,985.60, 779,404.80 and 451,635.20 is: 675,655.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,985.60 : 779,404.80 = 451,635.20 : x
  2. Step 2: Convert to fraction form
    520,985.60/779,404.80 = 451,635.20/x
  3. Step 3: Cross multiply
    520,985.60x = 779,404.80 × 451,635.20
  4. Step 4: Simplify right side
    520,985.60x = 352,006,642,728.96
  5. Step 5: Solve for x
    x = 352,006,642,728.96/520,985.60
  6. Step 6: Final answer
    x = 675,655.22

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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.