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Finding the Fourth Proportional to 714,672.79, 986,250.36 and 392,403.76

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Solution

The fourth proportional to 714,672.79, 986,250.36 and 392,403.76 is: 541,518.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,672.79 : 986,250.36 = 392,403.76 : x
  2. Step 2: Convert to fraction form
    714,672.79/986,250.36 = 392,403.76/x
  3. Step 3: Cross multiply
    714,672.79x = 986,250.36 × 392,403.76
  4. Step 4: Simplify right side
    714,672.79x = 387,008,348,571.24
  5. Step 5: Solve for x
    x = 387,008,348,571.24/714,672.79
  6. Step 6: Final answer
    x = 541,518.24

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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.