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Finding the Fourth Proportional to 714,207.06, 985,605.12 and 391,937.40

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Solution

The fourth proportional to 714,207.06, 985,605.12 and 391,937.40 is: 540,873.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,207.06 : 985,605.12 = 391,937.40 : x
  2. Step 2: Convert to fraction form
    714,207.06/985,605.12 = 391,937.40/x
  3. Step 3: Cross multiply
    714,207.06x = 985,605.12 × 391,937.40
  4. Step 4: Simplify right side
    714,207.06x = 386,295,508,159.49
  5. Step 5: Solve for x
    x = 386,295,508,159.49/714,207.06
  6. Step 6: Final answer
    x = 540,873.27

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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.