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Finding the Fourth Proportional to 305,444.69, 455,686.71 and 288,910.97

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Solution

The fourth proportional to 305,444.69, 455,686.71 and 288,910.97 is: 431,020.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,444.69 : 455,686.71 = 288,910.97 : x
  2. Step 2: Convert to fraction form
    305,444.69/455,686.71 = 288,910.97/x
  3. Step 3: Cross multiply
    305,444.69x = 455,686.71 × 288,910.97
  4. Step 4: Simplify right side
    305,444.69x = 131,652,887,123.78
  5. Step 5: Solve for x
    x = 131,652,887,123.78/305,444.69
  6. Step 6: Final answer
    x = 431,020.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.