Home / 870,125.40-1,305,188.10-858,315.60

Finding the Fourth Proportional to 870,125.40, 1,305,188.10 and 858,315.60

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Solution

The fourth proportional to 870,125.40, 1,305,188.10 and 858,315.60 is: 1,287,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,125.40 : 1,305,188.10 = 858,315.60 : x
  2. Step 2: Convert to fraction form
    870,125.40/1,305,188.10 = 858,315.60/x
  3. Step 3: Cross multiply
    870,125.40x = 1,305,188.10 × 858,315.60
  4. Step 4: Simplify right side
    870,125.40x = 1,120,263,307,164.36
  5. Step 5: Solve for x
    x = 1,120,263,307,164.36/870,125.40
  6. Step 6: Final answer
    x = 1,287,473.40

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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.