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Finding the Fourth Proportional to 674,240.65, 930,480.38 and 387,760.96

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Solution

The fourth proportional to 674,240.65, 930,480.38 and 387,760.96 is: 535,126.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,240.65 : 930,480.38 = 387,760.96 : x
  2. Step 2: Convert to fraction form
    674,240.65/930,480.38 = 387,760.96/x
  3. Step 3: Cross multiply
    674,240.65x = 930,480.38 × 387,760.96
  4. Step 4: Simplify right side
    674,240.65x = 360,803,966,088.36
  5. Step 5: Solve for x
    x = 360,803,966,088.36/674,240.65
  6. Step 6: Final answer
    x = 535,126.39

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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.