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Finding the Fourth Proportional to 660,876.40, 992,092.20 and 656,210.80

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Solution

The fourth proportional to 660,876.40, 992,092.20 and 656,210.80 is: 985,088.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,876.40 : 992,092.20 = 656,210.80 : x
  2. Step 2: Convert to fraction form
    660,876.40/992,092.20 = 656,210.80/x
  3. Step 3: Cross multiply
    660,876.40x = 992,092.20 × 656,210.80
  4. Step 4: Simplify right side
    660,876.40x = 651,021,616,235.76
  5. Step 5: Solve for x
    x = 651,021,616,235.76/660,876.40
  6. Step 6: Final answer
    x = 985,088.31

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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.