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Finding the Fourth Proportional to 291,686.80, 437,530.20 and 272,003.80

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Solution

The fourth proportional to 291,686.80, 437,530.20 and 272,003.80 is: 408,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,686.80 : 437,530.20 = 272,003.80 : x
  2. Step 2: Convert to fraction form
    291,686.80/437,530.20 = 272,003.80/x
  3. Step 3: Cross multiply
    291,686.80x = 437,530.20 × 272,003.80
  4. Step 4: Simplify right side
    291,686.80x = 119,009,877,014.76
  5. Step 5: Solve for x
    x = 119,009,877,014.76/291,686.80
  6. Step 6: Final answer
    x = 408,005.70

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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.