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Finding the Fourth Proportional to 278,990.88, 385,009.92 and 151,666.72

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Solution

The fourth proportional to 278,990.88, 385,009.92 and 151,666.72 is: 209,301.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,990.88 : 385,009.92 = 151,666.72 : x
  2. Step 2: Convert to fraction form
    278,990.88/385,009.92 = 151,666.72/x
  3. Step 3: Cross multiply
    278,990.88x = 385,009.92 × 151,666.72
  4. Step 4: Simplify right side
    278,990.88x = 58,393,191,733.86
  5. Step 5: Solve for x
    x = 58,393,191,733.86/278,990.88
  6. Step 6: Final answer
    x = 209,301.44

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1.5x scale

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.