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Finding the Fourth Proportional to 390,064.46, 585,054.77 and 264,510.61

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Solution

The fourth proportional to 390,064.46, 585,054.77 and 264,510.61 is: 396,737.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,064.46 : 585,054.77 = 264,510.61 : x
  2. Step 2: Convert to fraction form
    390,064.46/585,054.77 = 264,510.61/x
  3. Step 3: Cross multiply
    390,064.46x = 585,054.77 × 264,510.61
  4. Step 4: Simplify right side
    390,064.46x = 154,753,191,310.92
  5. Step 5: Solve for x
    x = 154,753,191,310.92/390,064.46
  6. Step 6: Final answer
    x = 396,737.49

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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.