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Finding the Fourth Proportional to 660,844.80, 991,267.20 and 475,603.20

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Solution

The fourth proportional to 660,844.80, 991,267.20 and 475,603.20 is: 713,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,844.80 : 991,267.20 = 475,603.20 : x
  2. Step 2: Convert to fraction form
    660,844.80/991,267.20 = 475,603.20/x
  3. Step 3: Cross multiply
    660,844.80x = 991,267.20 × 475,603.20
  4. Step 4: Simplify right side
    660,844.80x = 471,449,852,375.04
  5. Step 5: Solve for x
    x = 471,449,852,375.04/660,844.80
  6. Step 6: Final answer
    x = 713,404.80

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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.