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Finding the Fourth Proportional to 911,798.18, 1,258,310.43 and 498,325.89

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Solution

The fourth proportional to 911,798.18, 1,258,310.43 and 498,325.89 is: 687,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,798.18 : 1,258,310.43 = 498,325.89 : x
  2. Step 2: Convert to fraction form
    911,798.18/1,258,310.43 = 498,325.89/x
  3. Step 3: Cross multiply
    911,798.18x = 1,258,310.43 × 498,325.89
  4. Step 4: Simplify right side
    911,798.18x = 627,048,670,511.87
  5. Step 5: Solve for x
    x = 627,048,670,511.87/911,798.18
  6. Step 6: Final answer
    x = 687,705.55

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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.