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Finding the Fourth Proportional to 986,612.78, 1,361,526.84 and 533,903.78

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Solution

The fourth proportional to 986,612.78, 1,361,526.84 and 533,903.78 is: 736,787.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,612.78 : 1,361,526.84 = 533,903.78 : x
  2. Step 2: Convert to fraction form
    986,612.78/1,361,526.84 = 533,903.78/x
  3. Step 3: Cross multiply
    986,612.78x = 1,361,526.84 × 533,903.78
  4. Step 4: Simplify right side
    986,612.78x = 726,924,326,447.46
  5. Step 5: Solve for x
    x = 726,924,326,447.46/986,612.78
  6. Step 6: Final answer
    x = 736,787.87

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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.