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Finding the Fourth Proportional to 714,264.04, 985,712.78 and 391,985.76

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Solution

The fourth proportional to 714,264.04, 985,712.78 and 391,985.76 is: 540,955.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,264.04 : 985,712.78 = 391,985.76 : x
  2. Step 2: Convert to fraction form
    714,264.04/985,712.78 = 391,985.76/x
  3. Step 3: Cross multiply
    714,264.04x = 985,712.78 × 391,985.76
  4. Step 4: Simplify right side
    714,264.04x = 386,385,373,210.01
  5. Step 5: Solve for x
    x = 386,385,373,210.01/714,264.04
  6. Step 6: Final answer
    x = 540,955.94

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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.