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Finding the Fourth Proportional to 530,689.31, 732,359.98 and 288,976.60

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Solution

The fourth proportional to 530,689.31, 732,359.98 and 288,976.60 is: 398,792.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,689.31 : 732,359.98 = 288,976.60 : x
  2. Step 2: Convert to fraction form
    530,689.31/732,359.98 = 288,976.60/x
  3. Step 3: Cross multiply
    530,689.31x = 732,359.98 × 288,976.60
  4. Step 4: Simplify right side
    530,689.31x = 211,634,896,996.47
  5. Step 5: Solve for x
    x = 211,634,896,996.47/530,689.31
  6. Step 6: Final answer
    x = 398,792.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.