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Finding the Fourth Proportional to 485,302.12, 669,689.07 and 278,526.74

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Solution

The fourth proportional to 485,302.12, 669,689.07 and 278,526.74 is: 384,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,302.12 : 669,689.07 = 278,526.74 : x
  2. Step 2: Convert to fraction form
    485,302.12/669,689.07 = 278,526.74/x
  3. Step 3: Cross multiply
    485,302.12x = 669,689.07 × 278,526.74
  4. Step 4: Simplify right side
    485,302.12x = 186,526,309,087.81
  5. Step 5: Solve for x
    x = 186,526,309,087.81/485,302.12
  6. Step 6: Final answer
    x = 384,350.91

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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.