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Finding the Fourth Proportional to 312,355.58, 431,050.14 and 169,115.58

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Solution

The fourth proportional to 312,355.58, 431,050.14 and 169,115.58 is: 233,379.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,355.58 : 431,050.14 = 169,115.58 : x
  2. Step 2: Convert to fraction form
    312,355.58/431,050.14 = 169,115.58/x
  3. Step 3: Cross multiply
    312,355.58x = 431,050.14 × 169,115.58
  4. Step 4: Simplify right side
    312,355.58x = 72,897,294,435.18
  5. Step 5: Solve for x
    x = 72,897,294,435.18/312,355.58
  6. Step 6: Final answer
    x = 233,379.20

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1.5x scale

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.