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Finding the Fourth Proportional to 553,047.93, 763,177.14 and 311,322.47

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Solution

The fourth proportional to 553,047.93, 763,177.14 and 311,322.47 is: 429,608.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,047.93 : 763,177.14 = 311,322.47 : x
  2. Step 2: Convert to fraction form
    553,047.93/763,177.14 = 311,322.47/x
  3. Step 3: Cross multiply
    553,047.93x = 763,177.14 × 311,322.47
  4. Step 4: Simplify right side
    553,047.93x = 237,594,188,456.45
  5. Step 5: Solve for x
    x = 237,594,188,456.45/553,047.93
  6. Step 6: Final answer
    x = 429,608.68

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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.