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Finding the Fourth Proportional to 988,961.40, 1,483,442.10 and 866,926.80

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Solution

The fourth proportional to 988,961.40, 1,483,442.10 and 866,926.80 is: 1,300,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,961.40 : 1,483,442.10 = 866,926.80 : x
  2. Step 2: Convert to fraction form
    988,961.40/1,483,442.10 = 866,926.80/x
  3. Step 3: Cross multiply
    988,961.40x = 1,483,442.10 × 866,926.80
  4. Step 4: Simplify right side
    988,961.40x = 1,286,035,712,738.28
  5. Step 5: Solve for x
    x = 1,286,035,712,738.28/988,961.40
  6. Step 6: Final answer
    x = 1,300,390.20

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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.