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Finding the Fourth Proportional to 292,912.60, 439,368.90 and 254,421.40

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Solution

The fourth proportional to 292,912.60, 439,368.90 and 254,421.40 is: 381,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,912.60 : 439,368.90 = 254,421.40 : x
  2. Step 2: Convert to fraction form
    292,912.60/439,368.90 = 254,421.40/x
  3. Step 3: Cross multiply
    292,912.60x = 439,368.90 × 254,421.40
  4. Step 4: Simplify right side
    292,912.60x = 111,784,850,654.46
  5. Step 5: Solve for x
    x = 111,784,850,654.46/292,912.60
  6. Step 6: Final answer
    x = 381,632.10

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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.