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Finding the Fourth Proportional to 911,750.40, 1,258,214.40 and 509,342.40

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Solution

The fourth proportional to 911,750.40, 1,258,214.40 and 509,342.40 is: 702,891.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,750.40 : 1,258,214.40 = 509,342.40 : x
  2. Step 2: Convert to fraction form
    911,750.40/1,258,214.40 = 509,342.40/x
  3. Step 3: Cross multiply
    911,750.40x = 1,258,214.40 × 509,342.40
  4. Step 4: Simplify right side
    911,750.40x = 640,861,942,210.56
  5. Step 5: Solve for x
    x = 640,861,942,210.56/911,750.40
  6. Step 6: Final answer
    x = 702,891.87

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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.