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Finding the Fourth Proportional to 303,430.40, 455,254.95 and 126,064.70

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Solution

The fourth proportional to 303,430.40, 455,254.95 and 126,064.70 is: 189,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,430.40 : 455,254.95 = 126,064.70 : x
  2. Step 2: Convert to fraction form
    303,430.40/455,254.95 = 126,064.70/x
  3. Step 3: Cross multiply
    303,430.40x = 455,254.95 × 126,064.70
  4. Step 4: Simplify right side
    303,430.40x = 57,391,578,695.27
  5. Step 5: Solve for x
    x = 57,391,578,695.27/303,430.40
  6. Step 6: Final answer
    x = 189,142.48

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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.