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Finding the Fourth Proportional to 425,707.80, 637,686.90 and 215,464.20

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Solution

The fourth proportional to 425,707.80, 637,686.90 and 215,464.20 is: 322,753.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,707.80 : 637,686.90 = 215,464.20 : x
  2. Step 2: Convert to fraction form
    425,707.80/637,686.90 = 215,464.20/x
  3. Step 3: Cross multiply
    425,707.80x = 637,686.90 × 215,464.20
  4. Step 4: Simplify right side
    425,707.80x = 137,398,697,758.98
  5. Step 5: Solve for x
    x = 137,398,697,758.98/425,707.80
  6. Step 6: Final answer
    x = 322,753.54

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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.