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Finding the Fourth Proportional to 315,500.38, 435,388.32 and 172,259.98

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Solution

The fourth proportional to 315,500.38, 435,388.32 and 172,259.98 is: 237,717.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,500.38 : 435,388.32 = 172,259.98 : x
  2. Step 2: Convert to fraction form
    315,500.38/435,388.32 = 172,259.98/x
  3. Step 3: Cross multiply
    315,500.38x = 435,388.32 × 172,259.98
  4. Step 4: Simplify right side
    315,500.38x = 74,999,983,295.43
  5. Step 5: Solve for x
    x = 74,999,983,295.43/315,500.38
  6. Step 6: Final answer
    x = 237,717.57

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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.