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Finding the Fourth Proportional to 307,738.80, 461,147.40 and 260,737.20

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Solution

The fourth proportional to 307,738.80, 461,147.40 and 260,737.20 is: 390,715.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,738.80 : 461,147.40 = 260,737.20 : x
  2. Step 2: Convert to fraction form
    307,738.80/461,147.40 = 260,737.20/x
  3. Step 3: Cross multiply
    307,738.80x = 461,147.40 × 260,737.20
  4. Step 4: Simplify right side
    307,738.80x = 120,238,281,863.28
  5. Step 5: Solve for x
    x = 120,238,281,863.28/307,738.80
  6. Step 6: Final answer
    x = 390,715.38

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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.