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Finding the Fourth Proportional to 552,885.75, 763,055.64 and 311,215.23

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Solution

The fourth proportional to 552,885.75, 763,055.64 and 311,215.23 is: 429,518.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,885.75 : 763,055.64 = 311,215.23 : x
  2. Step 2: Convert to fraction form
    552,885.75/763,055.64 = 311,215.23/x
  3. Step 3: Cross multiply
    552,885.75x = 763,055.64 × 311,215.23
  4. Step 4: Simplify right side
    552,885.75x = 237,474,536,505.40
  5. Step 5: Solve for x
    x = 237,474,536,505.40/552,885.75
  6. Step 6: Final answer
    x = 429,518.28

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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.