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Finding the Fourth Proportional to 312,555.57, 431,326.29 and 169,316.20

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Solution

The fourth proportional to 312,555.57, 431,326.29 and 169,316.20 is: 233,656.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,555.57 : 431,326.29 = 169,316.20 : x
  2. Step 2: Convert to fraction form
    312,555.57/431,326.29 = 169,316.20/x
  3. Step 3: Cross multiply
    312,555.57x = 431,326.29 × 169,316.20
  4. Step 4: Simplify right side
    312,555.57x = 73,030,528,382.90
  5. Step 5: Solve for x
    x = 73,030,528,382.90/312,555.57
  6. Step 6: Final answer
    x = 233,656.14

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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.