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Finding the Fourth Proportional to 288,987.26, 398,792.60 and 159,931.20

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Solution

The fourth proportional to 288,987.26, 398,792.60 and 159,931.20 is: 220,699.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,987.26 : 398,792.60 = 159,931.20 : x
  2. Step 2: Convert to fraction form
    288,987.26/398,792.60 = 159,931.20/x
  3. Step 3: Cross multiply
    288,987.26x = 398,792.60 × 159,931.20
  4. Step 4: Simplify right side
    288,987.26x = 63,779,379,069.12
  5. Step 5: Solve for x
    x = 63,779,379,069.12/288,987.26
  6. Step 6: Final answer
    x = 220,699.62

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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.