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Finding the Fourth Proportional to 656,875.32, 906,487.53 and 355,069.32

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Solution

The fourth proportional to 656,875.32, 906,487.53 and 355,069.32 is: 489,995.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,875.32 : 906,487.53 = 355,069.32 : x
  2. Step 2: Convert to fraction form
    656,875.32/906,487.53 = 355,069.32/x
  3. Step 3: Cross multiply
    656,875.32x = 906,487.53 × 355,069.32
  4. Step 4: Simplify right side
    656,875.32x = 321,865,910,865.58
  5. Step 5: Solve for x
    x = 321,865,910,865.58/656,875.32
  6. Step 6: Final answer
    x = 489,995.44

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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.