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Finding the Fourth Proportional to 312,061.55, 430,640.73 and 174,242.61

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Solution

The fourth proportional to 312,061.55, 430,640.73 and 174,242.61 is: 240,452.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,061.55 : 430,640.73 = 174,242.61 : x
  2. Step 2: Convert to fraction form
    312,061.55/430,640.73 = 174,242.61/x
  3. Step 3: Cross multiply
    312,061.55x = 430,640.73 × 174,242.61
  4. Step 4: Simplify right side
    312,061.55x = 75,035,964,767.51
  5. Step 5: Solve for x
    x = 75,035,964,767.51/312,061.55
  6. Step 6: Final answer
    x = 240,452.46

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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.