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Finding the Fourth Proportional to 709,981.96, 979,783.14 and 387,695.92

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Solution

The fourth proportional to 709,981.96, 979,783.14 and 387,695.92 is: 535,024.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,981.96 : 979,783.14 = 387,695.92 : x
  2. Step 2: Convert to fraction form
    709,981.96/979,783.14 = 387,695.92/x
  3. Step 3: Cross multiply
    709,981.96x = 979,783.14 × 387,695.92
  4. Step 4: Simplify right side
    709,981.96x = 379,857,925,862.79
  5. Step 5: Solve for x
    x = 379,857,925,862.79/709,981.96
  6. Step 6: Final answer
    x = 535,024.76

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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.