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Finding the Fourth Proportional to 714,159.32, 985,537.13 and 391,874.81

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Solution

The fourth proportional to 714,159.32, 985,537.13 and 391,874.81 is: 540,785.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,159.32 : 985,537.13 = 391,874.81 : x
  2. Step 2: Convert to fraction form
    714,159.32/985,537.13 = 391,874.81/x
  3. Step 3: Cross multiply
    714,159.32x = 985,537.13 × 391,874.81
  4. Step 4: Simplify right side
    714,159.32x = 386,207,168,679.64
  5. Step 5: Solve for x
    x = 386,207,168,679.64/714,159.32
  6. Step 6: Final answer
    x = 540,785.73

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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.