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Finding the Fourth Proportional to 655,147.20, 904,595.85 and 644,684.40

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Solution

The fourth proportional to 655,147.20, 904,595.85 and 644,684.40 is: 890,149.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,147.20 : 904,595.85 = 644,684.40 : x
  2. Step 2: Convert to fraction form
    655,147.20/904,595.85 = 644,684.40/x
  3. Step 3: Cross multiply
    655,147.20x = 904,595.85 × 644,684.40
  4. Step 4: Simplify right side
    655,147.20x = 583,178,832,799.74
  5. Step 5: Solve for x
    x = 583,178,832,799.74/655,147.20
  6. Step 6: Final answer
    x = 890,149.32

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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.