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Finding the Fourth Proportional to 786,691.95, 1,085,354.96 and 464,240.67

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Solution

The fourth proportional to 786,691.95, 1,085,354.96 and 464,240.67 is: 640,486.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,691.95 : 1,085,354.96 = 464,240.67 : x
  2. Step 2: Convert to fraction form
    786,691.95/1,085,354.96 = 464,240.67/x
  3. Step 3: Cross multiply
    786,691.95x = 1,085,354.96 × 464,240.67
  4. Step 4: Simplify right side
    786,691.95x = 503,865,911,497.02
  5. Step 5: Solve for x
    x = 503,865,911,497.02/786,691.95
  6. Step 6: Final answer
    x = 640,486.93

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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.