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Finding the Fourth Proportional to 312,792.76, 431,647.08 and 169,549.12

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Solution

The fourth proportional to 312,792.76, 431,647.08 and 169,549.12 is: 233,974.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,792.76 : 431,647.08 = 169,549.12 : x
  2. Step 2: Convert to fraction form
    312,792.76/431,647.08 = 169,549.12/x
  3. Step 3: Cross multiply
    312,792.76x = 431,647.08 × 169,549.12
  4. Step 4: Simplify right side
    312,792.76x = 73,185,382,564.57
  5. Step 5: Solve for x
    x = 73,185,382,564.57/312,792.76
  6. Step 6: Final answer
    x = 233,974.03

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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.