Home / 287,720.91-431,847.25-145,666.05

Finding the Fourth Proportional to 287,720.91, 431,847.25 and 145,666.05

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Solution

The fourth proportional to 287,720.91, 431,847.25 and 145,666.05 is: 218,633.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,720.91 : 431,847.25 = 145,666.05 : x
  2. Step 2: Convert to fraction form
    287,720.91/431,847.25 = 145,666.05/x
  3. Step 3: Cross multiply
    287,720.91x = 431,847.25 × 145,666.05
  4. Step 4: Simplify right side
    287,720.91x = 62,905,481,127.27
  5. Step 5: Solve for x
    x = 62,905,481,127.27/287,720.91
  6. Step 6: Final answer
    x = 218,633.68

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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.