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Finding the Fourth Proportional to 310,346.96, 428,278.92 and 174,380.72

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Solution

The fourth proportional to 310,346.96, 428,278.92 and 174,380.72 is: 240,645.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,346.96 : 428,278.92 = 174,380.72 : x
  2. Step 2: Convert to fraction form
    310,346.96/428,278.92 = 174,380.72/x
  3. Step 3: Cross multiply
    310,346.96x = 428,278.92 × 174,380.72
  4. Step 4: Simplify right side
    310,346.96x = 74,683,586,430.42
  5. Step 5: Solve for x
    x = 74,683,586,430.42/310,346.96
  6. Step 6: Final answer
    x = 240,645.46

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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.