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Finding the Fourth Proportional to 290,381.04, 435,633.12 and 103,392

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Solution

The fourth proportional to 290,381.04, 435,633.12 and 103,392 is: 155,109.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,381.04 : 435,633.12 = 103,392 : x
  2. Step 2: Convert to fraction form
    290,381.04/435,633.12 = 103,392/x
  3. Step 3: Cross multiply
    290,381.04x = 435,633.12 × 103,392
  4. Step 4: Simplify right side
    290,381.04x = 45,040,979,543.04
  5. Step 5: Solve for x
    x = 45,040,979,543.04/290,381.04
  6. Step 6: Final answer
    x = 155,109.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.