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Finding the Fourth Proportional to 286,280.40, 429,420.60 and 279,719.40

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Solution

The fourth proportional to 286,280.40, 429,420.60 and 279,719.40 is: 419,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,280.40 : 429,420.60 = 279,719.40 : x
  2. Step 2: Convert to fraction form
    286,280.40/429,420.60 = 279,719.40/x
  3. Step 3: Cross multiply
    286,280.40x = 429,420.60 × 279,719.40
  4. Step 4: Simplify right side
    286,280.40x = 120,117,272,579.64
  5. Step 5: Solve for x
    x = 120,117,272,579.64/286,280.40
  6. Step 6: Final answer
    x = 419,579.10

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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.