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Finding the Fourth Proportional to 485,956.84, 728,940.06 and 170,421.32

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Solution

The fourth proportional to 485,956.84, 728,940.06 and 170,421.32 is: 255,633.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,956.84 : 728,940.06 = 170,421.32 : x
  2. Step 2: Convert to fraction form
    485,956.84/728,940.06 = 170,421.32/x
  3. Step 3: Cross multiply
    485,956.84x = 728,940.06 × 170,421.32
  4. Step 4: Simplify right side
    485,956.84x = 124,226,927,226.08
  5. Step 5: Solve for x
    x = 124,226,927,226.08/485,956.84
  6. Step 6: Final answer
    x = 255,633.66

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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.