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Finding the Fourth Proportional to 305,663.98, 458,510.56 and 128,176.78

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Solution

The fourth proportional to 305,663.98, 458,510.56 and 128,176.78 is: 192,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,663.98 : 458,510.56 = 128,176.78 : x
  2. Step 2: Convert to fraction form
    305,663.98/458,510.56 = 128,176.78/x
  3. Step 3: Cross multiply
    305,663.98x = 458,510.56 × 128,176.78
  4. Step 4: Simplify right side
    305,663.98x = 58,770,407,176.80
  5. Step 5: Solve for x
    x = 58,770,407,176.80/305,663.98
  6. Step 6: Final answer
    x = 192,271.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.