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Finding the Fourth Proportional to 399,715.32, 551,607.66 and 220,867.32

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Solution

The fourth proportional to 399,715.32, 551,607.66 and 220,867.32 is: 304,797.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,715.32 : 551,607.66 = 220,867.32 : x
  2. Step 2: Convert to fraction form
    399,715.32/551,607.66 = 220,867.32/x
  3. Step 3: Cross multiply
    399,715.32x = 551,607.66 × 220,867.32
  4. Step 4: Simplify right side
    399,715.32x = 121,832,105,555.67
  5. Step 5: Solve for x
    x = 121,832,105,555.67/399,715.32
  6. Step 6: Final answer
    x = 304,797.19

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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.