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Finding the Fourth Proportional to 656,915.95, 906,545.34 and 355,109.95

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Solution

The fourth proportional to 656,915.95, 906,545.34 and 355,109.95 is: 490,052.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,915.95 : 906,545.34 = 355,109.95 : x
  2. Step 2: Convert to fraction form
    656,915.95/906,545.34 = 355,109.95/x
  3. Step 3: Cross multiply
    656,915.95x = 906,545.34 × 355,109.95
  4. Step 4: Simplify right side
    656,915.95x = 321,923,270,360.13
  5. Step 5: Solve for x
    x = 321,923,270,360.13/656,915.95
  6. Step 6: Final answer
    x = 490,052.45

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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.