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Finding the Fourth Proportional to 674,240.58, 930,480.28 and 387,760.88

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Solution

The fourth proportional to 674,240.58, 930,480.28 and 387,760.88 is: 535,126.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,240.58 : 930,480.28 = 387,760.88 : x
  2. Step 2: Convert to fraction form
    674,240.58/930,480.28 = 387,760.88/x
  3. Step 3: Cross multiply
    674,240.58x = 930,480.28 × 387,760.88
  4. Step 4: Simplify right side
    674,240.58x = 360,803,853,552.25
  5. Step 5: Solve for x
    x = 360,803,853,552.25/674,240.58
  6. Step 6: Final answer
    x = 535,126.28

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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.