Home / 318,218.67-438,689.45-253,116.95

Finding the Fourth Proportional to 318,218.67, 438,689.45 and 253,116.95

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Solution

The fourth proportional to 318,218.67, 438,689.45 and 253,116.95 is: 348,941.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,218.67 : 438,689.45 = 253,116.95 : x
  2. Step 2: Convert to fraction form
    318,218.67/438,689.45 = 253,116.95/x
  3. Step 3: Cross multiply
    318,218.67x = 438,689.45 × 253,116.95
  4. Step 4: Simplify right side
    318,218.67x = 111,039,734,020.52
  5. Step 5: Solve for x
    x = 111,039,734,020.52/318,218.67
  6. Step 6: Final answer
    x = 348,941.61

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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.