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Finding the Fourth Proportional to 553,224.33, 763,442.30 and 311,530.76

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Solution

The fourth proportional to 553,224.33, 763,442.30 and 311,530.76 is: 429,908.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,224.33 : 763,442.30 = 311,530.76 : x
  2. Step 2: Convert to fraction form
    553,224.33/763,442.30 = 311,530.76/x
  3. Step 3: Cross multiply
    553,224.33x = 763,442.30 × 311,530.76
  4. Step 4: Simplify right side
    553,224.33x = 237,835,754,560.28
  5. Step 5: Solve for x
    x = 237,835,754,560.28/553,224.33
  6. Step 6: Final answer
    x = 429,908.35

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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.