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Finding the Fourth Proportional to 713,816.75, 985,068.54 and 391,529.50

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Solution

The fourth proportional to 713,816.75, 985,068.54 and 391,529.50 is: 540,311.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,816.75 : 985,068.54 = 391,529.50 : x
  2. Step 2: Convert to fraction form
    713,816.75/985,068.54 = 391,529.50/x
  3. Step 3: Cross multiply
    713,816.75x = 985,068.54 × 391,529.50
  4. Step 4: Simplify right side
    713,816.75x = 385,683,390,469.26
  5. Step 5: Solve for x
    x = 385,683,390,469.26/713,816.75
  6. Step 6: Final answer
    x = 540,311.49

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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.