Home / 858,612.40-1,287,918.60-485,364.40

Finding the Fourth Proportional to 858,612.40, 1,287,918.60 and 485,364.40

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Solution

The fourth proportional to 858,612.40, 1,287,918.60 and 485,364.40 is: 728,046.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,612.40 : 1,287,918.60 = 485,364.40 : x
  2. Step 2: Convert to fraction form
    858,612.40/1,287,918.60 = 485,364.40/x
  3. Step 3: Cross multiply
    858,612.40x = 1,287,918.60 × 485,364.40
  4. Step 4: Simplify right side
    858,612.40x = 625,109,838,537.84
  5. Step 5: Solve for x
    x = 625,109,838,537.84/858,612.40
  6. Step 6: Final answer
    x = 728,046.60

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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.