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Finding the Fourth Proportional to 291,990.52, 437,985.78 and 70,374.52

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Solution

The fourth proportional to 291,990.52, 437,985.78 and 70,374.52 is: 105,561.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,990.52 : 437,985.78 = 70,374.52 : x
  2. Step 2: Convert to fraction form
    291,990.52/437,985.78 = 70,374.52/x
  3. Step 3: Cross multiply
    291,990.52x = 437,985.78 × 70,374.52
  4. Step 4: Simplify right side
    291,990.52x = 30,823,039,034.33
  5. Step 5: Solve for x
    x = 30,823,039,034.33/291,990.52
  6. Step 6: Final answer
    x = 105,561.78

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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.