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Finding the Fourth Proportional to 287,454.88, 396,700 and 160,130.56

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Solution

The fourth proportional to 287,454.88, 396,700 and 160,130.56 is: 220,987.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,454.88 : 396,700 = 160,130.56 : x
  2. Step 2: Convert to fraction form
    287,454.88/396,700 = 160,130.56/x
  3. Step 3: Cross multiply
    287,454.88x = 396,700 × 160,130.56
  4. Step 4: Simplify right side
    287,454.88x = 63,523,793,152
  5. Step 5: Solve for x
    x = 63,523,793,152/287,454.88
  6. Step 6: Final answer
    x = 220,987.01

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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.