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Finding the Fourth Proportional to 551,456.80, 761,008.46 and 306,440.52

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Solution

The fourth proportional to 551,456.80, 761,008.46 and 306,440.52 is: 422,886.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,456.80 : 761,008.46 = 306,440.52 : x
  2. Step 2: Convert to fraction form
    551,456.80/761,008.46 = 306,440.52/x
  3. Step 3: Cross multiply
    551,456.80x = 761,008.46 × 306,440.52
  4. Step 4: Simplify right side
    551,456.80x = 233,203,828,206.80
  5. Step 5: Solve for x
    x = 233,203,828,206.80/551,456.80
  6. Step 6: Final answer
    x = 422,886.85

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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.