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Finding the Fourth Proportional to 388,909.56, 583,366.98 and 108,429.24

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Solution

The fourth proportional to 388,909.56, 583,366.98 and 108,429.24 is: 162,644.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,909.56 : 583,366.98 = 108,429.24 : x
  2. Step 2: Convert to fraction form
    388,909.56/583,366.98 = 108,429.24/x
  3. Step 3: Cross multiply
    388,909.56x = 583,366.98 × 108,429.24
  4. Step 4: Simplify right side
    388,909.56x = 63,254,038,282.50
  5. Step 5: Solve for x
    x = 63,254,038,282.50/388,909.56
  6. Step 6: Final answer
    x = 162,644.60

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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.