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Finding the Fourth Proportional to 841,696.80, 1,262,545.20 and 420,820.80

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Solution

The fourth proportional to 841,696.80, 1,262,545.20 and 420,820.80 is: 631,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    841,696.80 : 1,262,545.20 = 420,820.80 : x
  2. Step 2: Convert to fraction form
    841,696.80/1,262,545.20 = 420,820.80/x
  3. Step 3: Cross multiply
    841,696.80x = 1,262,545.20 × 420,820.80
  4. Step 4: Simplify right side
    841,696.80x = 531,305,281,100.16
  5. Step 5: Solve for x
    x = 531,305,281,100.16/841,696.80
  6. Step 6: Final answer
    x = 631,231.20

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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.