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Finding the Fourth Proportional to 312,084.66, 431,117.73 and 248,340.90

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Solution

The fourth proportional to 312,084.66, 431,117.73 and 248,340.90 is: 343,061.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,084.66 : 431,117.73 = 248,340.90 : x
  2. Step 2: Convert to fraction form
    312,084.66/431,117.73 = 248,340.90/x
  3. Step 3: Cross multiply
    312,084.66x = 431,117.73 × 248,340.90
  4. Step 4: Simplify right side
    312,084.66x = 107,064,165,074.16
  5. Step 5: Solve for x
    x = 107,064,165,074.16/312,084.66
  6. Step 6: Final answer
    x = 343,061.29

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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.