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Finding the Fourth Proportional to 714,690.42, 986,274.72 and 392,421.36

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Solution

The fourth proportional to 714,690.42, 986,274.72 and 392,421.36 is: 541,542.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,690.42 : 986,274.72 = 392,421.36 : x
  2. Step 2: Convert to fraction form
    714,690.42/986,274.72 = 392,421.36/x
  3. Step 3: Cross multiply
    714,690.42x = 986,274.72 × 392,421.36
  4. Step 4: Simplify right side
    714,690.42x = 387,035,266,956.02
  5. Step 5: Solve for x
    x = 387,035,266,956.02/714,690.42
  6. Step 6: Final answer
    x = 541,542.54

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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.