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Finding the Fourth Proportional to 315,659.99, 435,608.19 and 172,420.13

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Solution

The fourth proportional to 315,659.99, 435,608.19 and 172,420.13 is: 237,938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,659.99 : 435,608.19 = 172,420.13 : x
  2. Step 2: Convert to fraction form
    315,659.99/435,608.19 = 172,420.13/x
  3. Step 3: Cross multiply
    315,659.99x = 435,608.19 × 172,420.13
  4. Step 4: Simplify right side
    315,659.99x = 75,107,618,570.82
  5. Step 5: Solve for x
    x = 75,107,618,570.82/315,659.99
  6. Step 6: Final answer
    x = 237,938.36

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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.