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Finding the Fourth Proportional to 315,937.68, 436,005.72 and 172,707.44

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Solution

The fourth proportional to 315,937.68, 436,005.72 and 172,707.44 is: 238,342.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,937.68 : 436,005.72 = 172,707.44 : x
  2. Step 2: Convert to fraction form
    315,937.68/436,005.72 = 172,707.44/x
  3. Step 3: Cross multiply
    315,937.68x = 436,005.72 × 172,707.44
  4. Step 4: Simplify right side
    315,937.68x = 75,301,431,726.56
  5. Step 5: Solve for x
    x = 75,301,431,726.56/315,937.68
  6. Step 6: Final answer
    x = 238,342.67

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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.