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Finding the Fourth Proportional to 620,384.30, 866,766.55 and 620,384.30

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Solution

The fourth proportional to 620,384.30, 866,766.55 and 620,384.30 is: 866,766.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,384.30 : 866,766.55 = 620,384.30 : x
  2. Step 2: Convert to fraction form
    620,384.30/866,766.55 = 620,384.30/x
  3. Step 3: Cross multiply
    620,384.30x = 866,766.55 × 620,384.30
  4. Step 4: Simplify right side
    620,384.30x = 537,728,359,385.17
  5. Step 5: Solve for x
    x = 537,728,359,385.17/620,384.30
  6. Step 6: Final answer
    x = 866,766.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.