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Finding the Fourth Proportional to 315,279.60, 435,077.64 and 172,041.36

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Solution

The fourth proportional to 315,279.60, 435,077.64 and 172,041.36 is: 237,412.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,279.60 : 435,077.64 = 172,041.36 : x
  2. Step 2: Convert to fraction form
    315,279.60/435,077.64 = 172,041.36/x
  3. Step 3: Cross multiply
    315,279.60x = 435,077.64 × 172,041.36
  4. Step 4: Simplify right side
    315,279.60x = 74,851,348,891.19
  5. Step 5: Solve for x
    x = 74,851,348,891.19/315,279.60
  6. Step 6: Final answer
    x = 237,412.60

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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.