Home / 287,579.20-431,416.32-129,804.16

Finding the Fourth Proportional to 287,579.20, 431,416.32 and 129,804.16

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Solution

The fourth proportional to 287,579.20, 431,416.32 and 129,804.16 is: 194,727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,579.20 : 431,416.32 = 129,804.16 : x
  2. Step 2: Convert to fraction form
    287,579.20/431,416.32 = 129,804.16/x
  3. Step 3: Cross multiply
    287,579.20x = 431,416.32 × 129,804.16
  4. Step 4: Simplify right side
    287,579.20x = 55,999,633,027.89
  5. Step 5: Solve for x
    x = 55,999,633,027.89/287,579.20
  6. Step 6: Final answer
    x = 194,727.69

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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.