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Finding the Fourth Proportional to 478,639.98, 660,523.17 and 263,780.04

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Solution

The fourth proportional to 478,639.98, 660,523.17 and 263,780.04 is: 364,016.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,639.98 : 660,523.17 = 263,780.04 : x
  2. Step 2: Convert to fraction form
    478,639.98/660,523.17 = 263,780.04/x
  3. Step 3: Cross multiply
    478,639.98x = 660,523.17 × 263,780.04
  4. Step 4: Simplify right side
    478,639.98x = 174,232,828,203.53
  5. Step 5: Solve for x
    x = 174,232,828,203.53/478,639.98
  6. Step 6: Final answer
    x = 364,016.45

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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.