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Finding the Fourth Proportional to 551,957.15, 761,722.45 and 310,238.98

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Solution

The fourth proportional to 551,957.15, 761,722.45 and 310,238.98 is: 428,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,957.15 : 761,722.45 = 310,238.98 : x
  2. Step 2: Convert to fraction form
    551,957.15/761,722.45 = 310,238.98/x
  3. Step 3: Cross multiply
    551,957.15x = 761,722.45 × 310,238.98
  4. Step 4: Simplify right side
    551,957.15x = 236,315,993,251.20
  5. Step 5: Solve for x
    x = 236,315,993,251.20/551,957.15
  6. Step 6: Final answer
    x = 428,141.92

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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.