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Finding the Fourth Proportional to 656,872.70, 985,697.85 and 432,880.70

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Solution

The fourth proportional to 656,872.70, 985,697.85 and 432,880.70 is: 649,577.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,872.70 : 985,697.85 = 432,880.70 : x
  2. Step 2: Convert to fraction form
    656,872.70/985,697.85 = 432,880.70/x
  3. Step 3: Cross multiply
    656,872.70x = 985,697.85 × 432,880.70
  4. Step 4: Simplify right side
    656,872.70x = 426,689,575,296.50
  5. Step 5: Solve for x
    x = 426,689,575,296.50/656,872.70
  6. Step 6: Final answer
    x = 649,577.27

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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.