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Finding the Fourth Proportional to 399,284.04, 551,009.12 and 217,995.96

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Solution

The fourth proportional to 399,284.04, 551,009.12 and 217,995.96 is: 300,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,284.04 : 551,009.12 = 217,995.96 : x
  2. Step 2: Convert to fraction form
    399,284.04/551,009.12 = 217,995.96/x
  3. Step 3: Cross multiply
    399,284.04x = 551,009.12 × 217,995.96
  4. Step 4: Simplify right side
    399,284.04x = 120,117,759,328.11
  5. Step 5: Solve for x
    x = 120,117,759,328.11/399,284.04
  6. Step 6: Final answer
    x = 300,832.86

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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.