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Finding the Fourth Proportional to 478,723.61, 660,639.92 and 263,864.53

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Solution

The fourth proportional to 478,723.61, 660,639.92 and 263,864.53 is: 364,133.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,723.61 : 660,639.92 = 263,864.53 : x
  2. Step 2: Convert to fraction form
    478,723.61/660,639.92 = 263,864.53/x
  3. Step 3: Cross multiply
    478,723.61x = 660,639.92 × 263,864.53
  4. Step 4: Simplify right side
    478,723.61x = 174,319,438,686.84
  5. Step 5: Solve for x
    x = 174,319,438,686.84/478,723.61
  6. Step 6: Final answer
    x = 364,133.78

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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.