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Finding the Fourth Proportional to 315,470.33, 435,328.78 and 172,230.06

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Solution

The fourth proportional to 315,470.33, 435,328.78 and 172,230.06 is: 237,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,470.33 : 435,328.78 = 172,230.06 : x
  2. Step 2: Convert to fraction form
    315,470.33/435,328.78 = 172,230.06/x
  3. Step 3: Cross multiply
    315,470.33x = 435,328.78 × 172,230.06
  4. Step 4: Simplify right side
    315,470.33x = 74,976,701,037.98
  5. Step 5: Solve for x
    x = 74,976,701,037.98/315,470.33
  6. Step 6: Final answer
    x = 237,666.41

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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.