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Finding the Fourth Proportional to 656,817.60, 985,226.40 and 432,431.40

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Solution

The fourth proportional to 656,817.60, 985,226.40 and 432,431.40 is: 648,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,817.60 : 985,226.40 = 432,431.40 : x
  2. Step 2: Convert to fraction form
    656,817.60/985,226.40 = 432,431.40/x
  3. Step 3: Cross multiply
    656,817.60x = 985,226.40 × 432,431.40
  4. Step 4: Simplify right side
    656,817.60x = 426,042,831,468.96
  5. Step 5: Solve for x
    x = 426,042,831,468.96/656,817.60
  6. Step 6: Final answer
    x = 648,647.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.