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Finding the Fourth Proportional to 423,064.40, 634,625.40 and 134,853.20

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Solution

The fourth proportional to 423,064.40, 634,625.40 and 134,853.20 is: 202,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,064.40 : 634,625.40 = 134,853.20 : x
  2. Step 2: Convert to fraction form
    423,064.40/634,625.40 = 134,853.20/x
  3. Step 3: Cross multiply
    423,064.40x = 634,625.40 × 134,853.20
  4. Step 4: Simplify right side
    423,064.40x = 85,581,265,991.28
  5. Step 5: Solve for x
    x = 85,581,265,991.28/423,064.40
  6. Step 6: Final answer
    x = 202,288.98

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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.