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Finding the Fourth Proportional to 921,062.76, 1,381,780.46 and 388,585

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Solution

The fourth proportional to 921,062.76, 1,381,780.46 and 388,585 is: 582,956.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,062.76 : 1,381,780.46 = 388,585 : x
  2. Step 2: Convert to fraction form
    921,062.76/1,381,780.46 = 388,585/x
  3. Step 3: Cross multiply
    921,062.76x = 1,381,780.46 × 388,585
  4. Step 4: Simplify right side
    921,062.76x = 536,939,160,049.10
  5. Step 5: Solve for x
    x = 536,939,160,049.10/921,062.76
  6. Step 6: Final answer
    x = 582,956.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.