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Finding the Fourth Proportional to 315,514.76, 435,428.01 and 172,288.10

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Solution

The fourth proportional to 315,514.76, 435,428.01 and 172,288.10 is: 237,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,514.76 : 435,428.01 = 172,288.10 : x
  2. Step 2: Convert to fraction form
    315,514.76/435,428.01 = 172,288.10/x
  3. Step 3: Cross multiply
    315,514.76x = 435,428.01 × 172,288.10
  4. Step 4: Simplify right side
    315,514.76x = 75,019,064,529.68
  5. Step 5: Solve for x
    x = 75,019,064,529.68/315,514.76
  6. Step 6: Final answer
    x = 237,767.21

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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.