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Finding the Fourth Proportional to 315,458.19, 435,330.09 and 172,218.24

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Solution

The fourth proportional to 315,458.19, 435,330.09 and 172,218.24 is: 237,659.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,458.19 : 435,330.09 = 172,218.24 : x
  2. Step 2: Convert to fraction form
    315,458.19/435,330.09 = 172,218.24/x
  3. Step 3: Cross multiply
    315,458.19x = 435,330.09 × 172,218.24
  4. Step 4: Simplify right side
    315,458.19x = 74,971,781,918.84
  5. Step 5: Solve for x
    x = 74,971,781,918.84/315,458.19
  6. Step 6: Final answer
    x = 237,659.96

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1.5x scale

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.