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Finding the Fourth Proportional to 552,999.69, 763,080.75 and 311,278.14

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Solution

The fourth proportional to 552,999.69, 763,080.75 and 311,278.14 is: 429,530.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,999.69 : 763,080.75 = 311,278.14 : x
  2. Step 2: Convert to fraction form
    552,999.69/763,080.75 = 311,278.14/x
  3. Step 3: Cross multiply
    552,999.69x = 763,080.75 × 311,278.14
  4. Step 4: Simplify right side
    552,999.69x = 237,530,356,529.81
  5. Step 5: Solve for x
    x = 237,530,356,529.81/552,999.69
  6. Step 6: Final answer
    x = 429,530.72

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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.