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Finding the Fourth Proportional to 399,332.38, 551,090.02 and 218,055.82

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Solution

The fourth proportional to 399,332.38, 551,090.02 and 218,055.82 is: 300,923.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,332.38 : 551,090.02 = 218,055.82 : x
  2. Step 2: Convert to fraction form
    399,332.38/551,090.02 = 218,055.82/x
  3. Step 3: Cross multiply
    399,332.38x = 551,090.02 × 218,055.82
  4. Step 4: Simplify right side
    399,332.38x = 120,168,386,204.92
  5. Step 5: Solve for x
    x = 120,168,386,204.92/399,332.38
  6. Step 6: Final answer
    x = 300,923.22

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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.