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Finding the Fourth Proportional to 553,642.20, 829,807.20 and 287,265.60

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Solution

The fourth proportional to 553,642.20, 829,807.20 and 287,265.60 is: 430,557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,642.20 : 829,807.20 = 287,265.60 : x
  2. Step 2: Convert to fraction form
    553,642.20/829,807.20 = 287,265.60/x
  3. Step 3: Cross multiply
    553,642.20x = 829,807.20 × 287,265.60
  4. Step 4: Simplify right side
    553,642.20x = 238,375,063,192.32
  5. Step 5: Solve for x
    x = 238,375,063,192.32/553,642.20
  6. Step 6: Final answer
    x = 430,557.97

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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.