Home / 287,579.57-431,424.02-129,807.56

Finding the Fourth Proportional to 287,579.57, 431,424.02 and 129,807.56

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Solution

The fourth proportional to 287,579.57, 431,424.02 and 129,807.56 is: 194,736.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,579.57 : 431,424.02 = 129,807.56 : x
  2. Step 2: Convert to fraction form
    287,579.57/431,424.02 = 129,807.56/x
  3. Step 3: Cross multiply
    287,579.57x = 431,424.02 × 129,807.56
  4. Step 4: Simplify right side
    287,579.57x = 56,002,100,764.67
  5. Step 5: Solve for x
    x = 56,002,100,764.67/287,579.57
  6. Step 6: Final answer
    x = 194,736.02

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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.