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Finding the Fourth Proportional to 713,368.80, 984,511.04 and 391,140.36

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Solution

The fourth proportional to 713,368.80, 984,511.04 and 391,140.36 is: 539,807.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,368.80 : 984,511.04 = 391,140.36 : x
  2. Step 2: Convert to fraction form
    713,368.80/984,511.04 = 391,140.36/x
  3. Step 3: Cross multiply
    713,368.80x = 984,511.04 × 391,140.36
  4. Step 4: Simplify right side
    713,368.80x = 385,082,002,609.57
  5. Step 5: Solve for x
    x = 385,082,002,609.57/713,368.80
  6. Step 6: Final answer
    x = 539,807.74

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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.