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Finding the Fourth Proportional to 660,400.60, 989,726.10 and 585,167.80

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Solution

The fourth proportional to 660,400.60, 989,726.10 and 585,167.80 is: 876,976.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,400.60 : 989,726.10 = 585,167.80 : x
  2. Step 2: Convert to fraction form
    660,400.60/989,726.10 = 585,167.80/x
  3. Step 3: Cross multiply
    660,400.60x = 989,726.10 × 585,167.80
  4. Step 4: Simplify right side
    660,400.60x = 579,155,844,539.58
  5. Step 5: Solve for x
    x = 579,155,844,539.58/660,400.60
  6. Step 6: Final answer
    x = 876,976.56

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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.