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Finding the Fourth Proportional to 310,435.52, 428,402.72 and 181,381.57

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Solution

The fourth proportional to 310,435.52, 428,402.72 and 181,381.57 is: 250,307.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,435.52 : 428,402.72 = 181,381.57 : x
  2. Step 2: Convert to fraction form
    310,435.52/428,402.72 = 181,381.57/x
  3. Step 3: Cross multiply
    310,435.52x = 428,402.72 × 181,381.57
  4. Step 4: Simplify right side
    310,435.52x = 77,704,357,328.32
  5. Step 5: Solve for x
    x = 77,704,357,328.32/310,435.52
  6. Step 6: Final answer
    x = 250,307.56

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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.