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Finding the Fourth Proportional to 647,999.70, 908,132.70 and 647,999.70

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Solution

The fourth proportional to 647,999.70, 908,132.70 and 647,999.70 is: 908,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.70 : 908,132.70 = 647,999.70 : x
  2. Step 2: Convert to fraction form
    647,999.70/908,132.70 = 647,999.70/x
  3. Step 3: Cross multiply
    647,999.70x = 908,132.70 × 647,999.70
  4. Step 4: Simplify right side
    647,999.70x = 588,469,717,160.19
  5. Step 5: Solve for x
    x = 588,469,717,160.19/647,999.70
  6. Step 6: Final answer
    x = 908,132.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.