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Finding the Fourth Proportional to 632,503.40, 872,936.88 and 390,903.08

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Solution

The fourth proportional to 632,503.40, 872,936.88 and 390,903.08 is: 539,497.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,503.40 : 872,936.88 = 390,903.08 : x
  2. Step 2: Convert to fraction form
    632,503.40/872,936.88 = 390,903.08/x
  3. Step 3: Cross multiply
    632,503.40x = 872,936.88 × 390,903.08
  4. Step 4: Simplify right side
    632,503.40x = 341,233,715,037.59
  5. Step 5: Solve for x
    x = 341,233,715,037.59/632,503.40
  6. Step 6: Final answer
    x = 539,497.04

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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.