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Finding the Fourth Proportional to 713,116.50, 984,108.30 and 390,819.52

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Solution

The fourth proportional to 713,116.50, 984,108.30 and 390,819.52 is: 539,335.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,116.50 : 984,108.30 = 390,819.52 : x
  2. Step 2: Convert to fraction form
    713,116.50/984,108.30 = 390,819.52/x
  3. Step 3: Cross multiply
    713,116.50x = 984,108.30 × 390,819.52
  4. Step 4: Simplify right side
    713,116.50x = 384,608,733,434.02
  5. Step 5: Solve for x
    x = 384,608,733,434.02/713,116.50
  6. Step 6: Final answer
    x = 539,335.06

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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.