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Finding the Fourth Proportional to 479,979, 720,085.14 and 147,555

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Solution

The fourth proportional to 479,979, 720,085.14 and 147,555 is: 221,368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,979 : 720,085.14 = 147,555 : x
  2. Step 2: Convert to fraction form
    479,979/720,085.14 = 147,555/x
  3. Step 3: Cross multiply
    479,979x = 720,085.14 × 147,555
  4. Step 4: Simplify right side
    479,979x = 106,252,162,832.70
  5. Step 5: Solve for x
    x = 106,252,162,832.70/479,979
  6. Step 6: Final answer
    x = 221,368.36

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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.