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Finding the Fourth Proportional to 272,240, 375,691.20 and 153,008

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Solution

The fourth proportional to 272,240, 375,691.20 and 153,008 is: 211,151.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,240 : 375,691.20 = 153,008 : x
  2. Step 2: Convert to fraction form
    272,240/375,691.20 = 153,008/x
  3. Step 3: Cross multiply
    272,240x = 375,691.20 × 153,008
  4. Step 4: Simplify right side
    272,240x = 57,483,759,129.60
  5. Step 5: Solve for x
    x = 57,483,759,129.60/272,240
  6. Step 6: Final answer
    x = 211,151.04

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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.