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Finding the Fourth Proportional to 674,054, 930,186.76 and 387,575.20

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Solution

The fourth proportional to 674,054, 930,186.76 and 387,575.20 is: 534,849.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,054 : 930,186.76 = 387,575.20 : x
  2. Step 2: Convert to fraction form
    674,054/930,186.76 = 387,575.20/x
  3. Step 3: Cross multiply
    674,054x = 930,186.76 × 387,575.20
  4. Step 4: Simplify right side
    674,054x = 360,517,319,544.35
  5. Step 5: Solve for x
    x = 360,517,319,544.35/674,054
  6. Step 6: Final answer
    x = 534,849.31

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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.