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Finding the Fourth Proportional to 674,238.61, 930,477.55 and 387,758.92

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Solution

The fourth proportional to 674,238.61, 930,477.55 and 387,758.92 is: 535,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,238.61 : 930,477.55 = 387,758.92 : x
  2. Step 2: Convert to fraction form
    674,238.61/930,477.55 = 387,758.92/x
  3. Step 3: Cross multiply
    674,238.61x = 930,477.55 × 387,758.92
  4. Step 4: Simplify right side
    674,238.61x = 360,800,965,219.86
  5. Step 5: Solve for x
    x = 360,800,965,219.86/674,238.61
  6. Step 6: Final answer
    x = 535,123.56

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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.