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Finding the Fourth Proportional to 315,291.29, 435,111.21 and 172,060.56

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Solution

The fourth proportional to 315,291.29, 435,111.21 and 172,060.56 is: 237,448.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,291.29 : 435,111.21 = 172,060.56 : x
  2. Step 2: Convert to fraction form
    315,291.29/435,111.21 = 172,060.56/x
  3. Step 3: Cross multiply
    315,291.29x = 435,111.21 × 172,060.56
  4. Step 4: Simplify right side
    315,291.29x = 74,865,478,454.88
  5. Step 5: Solve for x
    x = 74,865,478,454.88/315,291.29
  6. Step 6: Final answer
    x = 237,448.61

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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.