Home / 287,235.12-431,118.91-145,179.39

Finding the Fourth Proportional to 287,235.12, 431,118.91 and 145,179.39

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Solution

The fourth proportional to 287,235.12, 431,118.91 and 145,179.39 is: 217,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,235.12 : 431,118.91 = 145,179.39 : x
  2. Step 2: Convert to fraction form
    287,235.12/431,118.91 = 145,179.39/x
  3. Step 3: Cross multiply
    287,235.12x = 431,118.91 × 145,179.39
  4. Step 4: Simplify right side
    287,235.12x = 62,589,580,552.74
  5. Step 5: Solve for x
    x = 62,589,580,552.74/287,235.12
  6. Step 6: Final answer
    x = 217,903.65

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1.5x scale

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.