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Finding the Fourth Proportional to 660,788.75, 911,889.29 and 358,982.75

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Solution

The fourth proportional to 660,788.75, 911,889.29 and 358,982.75 is: 495,396.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,788.75 : 911,889.29 = 358,982.75 : x
  2. Step 2: Convert to fraction form
    660,788.75/911,889.29 = 358,982.75/x
  3. Step 3: Cross multiply
    660,788.75x = 911,889.29 × 358,982.75
  4. Step 4: Simplify right side
    660,788.75x = 327,352,523,224.83
  5. Step 5: Solve for x
    x = 327,352,523,224.83/660,788.75
  6. Step 6: Final answer
    x = 495,396.64

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Double scale
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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.