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Finding the Fourth Proportional to 680,223.89, 938,715.64 and 374,306.86

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Solution

The fourth proportional to 680,223.89, 938,715.64 and 374,306.86 is: 516,547.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,223.89 : 938,715.64 = 374,306.86 : x
  2. Step 2: Convert to fraction form
    680,223.89/938,715.64 = 374,306.86/x
  3. Step 3: Cross multiply
    680,223.89x = 938,715.64 × 374,306.86
  4. Step 4: Simplify right side
    680,223.89x = 351,367,703,878.92
  5. Step 5: Solve for x
    x = 351,367,703,878.92/680,223.89
  6. Step 6: Final answer
    x = 516,547.14

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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.