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Finding the Fourth Proportional to 714,944.34, 986,629.95 and 392,661

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Solution

The fourth proportional to 714,944.34, 986,629.95 and 392,661 is: 541,875.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,944.34 : 986,629.95 = 392,661 : x
  2. Step 2: Convert to fraction form
    714,944.34/986,629.95 = 392,661/x
  3. Step 3: Cross multiply
    714,944.34x = 986,629.95 × 392,661
  4. Step 4: Simplify right side
    714,944.34x = 387,411,102,796.95
  5. Step 5: Solve for x
    x = 387,411,102,796.95/714,944.34
  6. Step 6: Final answer
    x = 541,875.89

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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.