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Finding the Fourth Proportional to 553,267.63, 763,501.80 and 311,553.10

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Solution

The fourth proportional to 553,267.63, 763,501.80 and 311,553.10 is: 429,939.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,267.63 : 763,501.80 = 311,553.10 : x
  2. Step 2: Convert to fraction form
    553,267.63/763,501.80 = 311,553.10/x
  3. Step 3: Cross multiply
    553,267.63x = 763,501.80 × 311,553.10
  4. Step 4: Simplify right side
    553,267.63x = 237,871,352,645.58
  5. Step 5: Solve for x
    x = 237,871,352,645.58/553,267.63
  6. Step 6: Final answer
    x = 429,939.04

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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.