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Finding the Fourth Proportional to 713,806.02, 985,079.88 and 391,529.70

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Solution

The fourth proportional to 713,806.02, 985,079.88 and 391,529.70 is: 540,326.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,806.02 : 985,079.88 = 391,529.70 : x
  2. Step 2: Convert to fraction form
    713,806.02/985,079.88 = 391,529.70/x
  3. Step 3: Cross multiply
    713,806.02x = 985,079.88 × 391,529.70
  4. Step 4: Simplify right side
    713,806.02x = 385,688,029,892.44
  5. Step 5: Solve for x
    x = 385,688,029,892.44/713,806.02
  6. Step 6: Final answer
    x = 540,326.11

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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.