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Finding the Fourth Proportional to 515,602.19, 711,535.88 and 289,252.55

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Solution

The fourth proportional to 515,602.19, 711,535.88 and 289,252.55 is: 399,171.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,602.19 : 711,535.88 = 289,252.55 : x
  2. Step 2: Convert to fraction form
    515,602.19/711,535.88 = 289,252.55/x
  3. Step 3: Cross multiply
    515,602.19x = 711,535.88 × 289,252.55
  4. Step 4: Simplify right side
    515,602.19x = 205,813,567,706.49
  5. Step 5: Solve for x
    x = 205,813,567,706.49/515,602.19
  6. Step 6: Final answer
    x = 399,171.24

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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.