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Finding the Fourth Proportional to 666,121.05, 997,442.40 and 437,698.47

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Solution

The fourth proportional to 666,121.05, 997,442.40 and 437,698.47 is: 655,404.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,121.05 : 997,442.40 = 437,698.47 : x
  2. Step 2: Convert to fraction form
    666,121.05/997,442.40 = 437,698.47/x
  3. Step 3: Cross multiply
    666,121.05x = 997,442.40 × 437,698.47
  4. Step 4: Simplify right side
    666,121.05x = 436,579,012,393.13
  5. Step 5: Solve for x
    x = 436,579,012,393.13/666,121.05
  6. Step 6: Final answer
    x = 655,404.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.