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Finding the Fourth Proportional to 660,217.50, 911,111.19 and 358,411.50

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Solution

The fourth proportional to 660,217.50, 911,111.19 and 358,411.50 is: 494,613.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,217.50 : 911,111.19 = 358,411.50 : x
  2. Step 2: Convert to fraction form
    660,217.50/911,111.19 = 358,411.50/x
  3. Step 3: Cross multiply
    660,217.50x = 911,111.19 × 358,411.50
  4. Step 4: Simplify right side
    660,217.50x = 326,552,728,274.69
  5. Step 5: Solve for x
    x = 326,552,728,274.69/660,217.50
  6. Step 6: Final answer
    x = 494,613.86

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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.