Home / 870,400.80-1,305,601.20-730,432.80

Finding the Fourth Proportional to 870,400.80, 1,305,601.20 and 730,432.80

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Solution

The fourth proportional to 870,400.80, 1,305,601.20 and 730,432.80 is: 1,095,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,400.80 : 1,305,601.20 = 730,432.80 : x
  2. Step 2: Convert to fraction form
    870,400.80/1,305,601.20 = 730,432.80/x
  3. Step 3: Cross multiply
    870,400.80x = 1,305,601.20 × 730,432.80
  4. Step 4: Simplify right side
    870,400.80x = 953,653,940,199.36
  5. Step 5: Solve for x
    x = 953,653,940,199.36/870,400.80
  6. Step 6: Final answer
    x = 1,095,649.20

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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.