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Finding the Fourth Proportional to 656,686.92, 906,228.42 and 354,880.92

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Solution

The fourth proportional to 656,686.92, 906,228.42 and 354,880.92 is: 489,735.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,686.92 : 906,228.42 = 354,880.92 : x
  2. Step 2: Convert to fraction form
    656,686.92/906,228.42 = 354,880.92/x
  3. Step 3: Cross multiply
    656,686.92x = 906,228.42 × 354,880.92
  4. Step 4: Simplify right side
    656,686.92x = 321,603,175,419.75
  5. Step 5: Solve for x
    x = 321,603,175,419.75/656,686.92
  6. Step 6: Final answer
    x = 489,735.92

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Double scale
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Similar ratio
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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.