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Finding the Fourth Proportional to 386,356.77, 579,528.96 and 105,874.02

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Solution

The fourth proportional to 386,356.77, 579,528.96 and 105,874.02 is: 158,809.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,356.77 : 579,528.96 = 105,874.02 : x
  2. Step 2: Convert to fraction form
    386,356.77/579,528.96 = 105,874.02/x
  3. Step 3: Cross multiply
    386,356.77x = 579,528.96 × 105,874.02
  4. Step 4: Simplify right side
    386,356.77x = 61,357,060,701.62
  5. Step 5: Solve for x
    x = 61,357,060,701.62/386,356.77
  6. Step 6: Final answer
    x = 158,809.33

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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.