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Finding the Fourth Proportional to 911,699.82, 1,258,149.71 and 498,244.97

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Solution

The fourth proportional to 911,699.82, 1,258,149.71 and 498,244.97 is: 687,580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,699.82 : 1,258,149.71 = 498,244.97 : x
  2. Step 2: Convert to fraction form
    911,699.82/1,258,149.71 = 498,244.97/x
  3. Step 3: Cross multiply
    911,699.82x = 1,258,149.71 × 498,244.97
  4. Step 4: Simplify right side
    911,699.82x = 626,866,768,905.45
  5. Step 5: Solve for x
    x = 626,866,768,905.45/911,699.82
  6. Step 6: Final answer
    x = 687,580.23

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1.5x scale

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.