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Finding the Fourth Proportional to 870,968, 1,201,843.68 and 489,037.76

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Solution

The fourth proportional to 870,968, 1,201,843.68 and 489,037.76 is: 674,820.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,968 : 1,201,843.68 = 489,037.76 : x
  2. Step 2: Convert to fraction form
    870,968/1,201,843.68 = 489,037.76/x
  3. Step 3: Cross multiply
    870,968x = 1,201,843.68 × 489,037.76
  4. Step 4: Simplify right side
    870,968x = 587,746,941,137.36
  5. Step 5: Solve for x
    x = 587,746,941,137.36/870,968
  6. Step 6: Final answer
    x = 674,820.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.