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Finding the Fourth Proportional to 869,399.40, 1,304,099.10 and 587,389.80

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Solution

The fourth proportional to 869,399.40, 1,304,099.10 and 587,389.80 is: 881,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,399.40 : 1,304,099.10 = 587,389.80 : x
  2. Step 2: Convert to fraction form
    869,399.40/1,304,099.10 = 587,389.80/x
  3. Step 3: Cross multiply
    869,399.40x = 1,304,099.10 × 587,389.80
  4. Step 4: Simplify right side
    869,399.40x = 766,014,509,529.18
  5. Step 5: Solve for x
    x = 766,014,509,529.18/869,399.40
  6. Step 6: Final answer
    x = 881,084.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.