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Finding the Fourth Proportional to 911,752.90, 1,258,217.85 and 509,344.90

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Solution

The fourth proportional to 911,752.90, 1,258,217.85 and 509,344.90 is: 702,895.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,752.90 : 1,258,217.85 = 509,344.90 : x
  2. Step 2: Convert to fraction form
    911,752.90/1,258,217.85 = 509,344.90/x
  3. Step 3: Cross multiply
    911,752.90x = 1,258,217.85 × 509,344.90
  4. Step 4: Simplify right side
    911,752.90x = 640,866,844,986.47
  5. Step 5: Solve for x
    x = 640,866,844,986.47/911,752.90
  6. Step 6: Final answer
    x = 702,895.32

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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.