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Finding the Fourth Proportional to 353,691.66, 487,013.61 and 266,603.20

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Solution

The fourth proportional to 353,691.66, 487,013.61 and 266,603.20 is: 367,097.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,691.66 : 487,013.61 = 266,603.20 : x
  2. Step 2: Convert to fraction form
    353,691.66/487,013.61 = 266,603.20/x
  3. Step 3: Cross multiply
    353,691.66x = 487,013.61 × 266,603.20
  4. Step 4: Simplify right side
    353,691.66x = 129,839,386,651.78
  5. Step 5: Solve for x
    x = 129,839,386,651.78/353,691.66
  6. Step 6: Final answer
    x = 367,097.67

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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.