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Finding the Fourth Proportional to 310,117.52, 428,008.47 and 189,328.83

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Solution

The fourth proportional to 310,117.52, 428,008.47 and 189,328.83 is: 261,302.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,117.52 : 428,008.47 = 189,328.83 : x
  2. Step 2: Convert to fraction form
    310,117.52/428,008.47 = 189,328.83/x
  3. Step 3: Cross multiply
    310,117.52x = 428,008.47 × 189,328.83
  4. Step 4: Simplify right side
    310,117.52x = 81,034,340,540.18
  5. Step 5: Solve for x
    x = 81,034,340,540.18/310,117.52
  6. Step 6: Final answer
    x = 261,302.04

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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.