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Finding the Fourth Proportional to 674,240.40, 930,480.03 and 387,760.71

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Solution

The fourth proportional to 674,240.40, 930,480.03 and 387,760.71 is: 535,126.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,240.40 : 930,480.03 = 387,760.71 : x
  2. Step 2: Convert to fraction form
    674,240.40/930,480.03 = 387,760.71/x
  3. Step 3: Cross multiply
    674,240.40x = 930,480.03 × 387,760.71
  4. Step 4: Simplify right side
    674,240.40x = 360,803,597,073.62
  5. Step 5: Solve for x
    x = 360,803,597,073.62/674,240.40
  6. Step 6: Final answer
    x = 535,126.04

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Double scale
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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.