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Finding the Fourth Proportional to 714,237.66, 985,645.06 and 391,953.13

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Solution

The fourth proportional to 714,237.66, 985,645.06 and 391,953.13 is: 540,893.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,237.66 : 985,645.06 = 391,953.13 : x
  2. Step 2: Convert to fraction form
    714,237.66/985,645.06 = 391,953.13/x
  3. Step 3: Cross multiply
    714,237.66x = 985,645.06 × 391,953.13
  4. Step 4: Simplify right side
    714,237.66x = 386,326,662,892.04
  5. Step 5: Solve for x
    x = 386,326,662,892.04/714,237.66
  6. Step 6: Final answer
    x = 540,893.72

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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.