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Finding the Fourth Proportional to 878,812.89, 1,212,750.88 and 516,269.80

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Solution

The fourth proportional to 878,812.89, 1,212,750.88 and 516,269.80 is: 712,445.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,812.89 : 1,212,750.88 = 516,269.80 : x
  2. Step 2: Convert to fraction form
    878,812.89/1,212,750.88 = 516,269.80/x
  3. Step 3: Cross multiply
    878,812.89x = 1,212,750.88 × 516,269.80
  4. Step 4: Simplify right side
    878,812.89x = 626,106,657,396.71
  5. Step 5: Solve for x
    x = 626,106,657,396.71/878,812.89
  6. Step 6: Final answer
    x = 712,445.92

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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.