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Finding the Fourth Proportional to 347,426.79, 478,793.73 and 278,437.89

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Solution

The fourth proportional to 347,426.79, 478,793.73 and 278,437.89 is: 383,719.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,426.79 : 478,793.73 = 278,437.89 : x
  2. Step 2: Convert to fraction form
    347,426.79/478,793.73 = 278,437.89/x
  3. Step 3: Cross multiply
    347,426.79x = 478,793.73 × 278,437.89
  4. Step 4: Simplify right side
    347,426.79x = 133,314,315,926.43
  5. Step 5: Solve for x
    x = 133,314,315,926.43/347,426.79
  6. Step 6: Final answer
    x = 383,719.16

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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.