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Finding the Fourth Proportional to 485,158.15, 669,502.56 and 278,460.57

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Solution

The fourth proportional to 485,158.15, 669,502.56 and 278,460.57 is: 384,266.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,158.15 : 669,502.56 = 278,460.57 : x
  2. Step 2: Convert to fraction form
    485,158.15/669,502.56 = 278,460.57/x
  3. Step 3: Cross multiply
    485,158.15x = 669,502.56 × 278,460.57
  4. Step 4: Simplify right side
    485,158.15x = 186,430,068,028.92
  5. Step 5: Solve for x
    x = 186,430,068,028.92/485,158.15
  6. Step 6: Final answer
    x = 384,266.59

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1.5x scale

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.