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Finding the Fourth Proportional to 539,079.60, 808,813.80 and 519,639.60

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Solution

The fourth proportional to 539,079.60, 808,813.80 and 519,639.60 is: 779,646.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,079.60 : 808,813.80 = 519,639.60 : x
  2. Step 2: Convert to fraction form
    539,079.60/808,813.80 = 519,639.60/x
  3. Step 3: Cross multiply
    539,079.60x = 808,813.80 × 519,639.60
  4. Step 4: Simplify right side
    539,079.60x = 420,291,679,506.48
  5. Step 5: Solve for x
    x = 420,291,679,506.48/539,079.60
  6. Step 6: Final answer
    x = 779,646.79

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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.