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Finding the Fourth Proportional to 553,266.63, 763,500.42 and 311,552.10

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Solution

The fourth proportional to 553,266.63, 763,500.42 and 311,552.10 is: 429,937.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,266.63 : 763,500.42 = 311,552.10 : x
  2. Step 2: Convert to fraction form
    553,266.63/763,500.42 = 311,552.10/x
  3. Step 3: Cross multiply
    553,266.63x = 763,500.42 × 311,552.10
  4. Step 4: Simplify right side
    553,266.63x = 237,870,159,201.88
  5. Step 5: Solve for x
    x = 237,870,159,201.88/553,266.63
  6. Step 6: Final answer
    x = 429,937.66

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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.