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Finding the Fourth Proportional to 427,096.80, 640,207.80 and 249,512.40

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Solution

The fourth proportional to 427,096.80, 640,207.80 and 249,512.40 is: 374,013.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,096.80 : 640,207.80 = 249,512.40 : x
  2. Step 2: Convert to fraction form
    427,096.80/640,207.80 = 249,512.40/x
  3. Step 3: Cross multiply
    427,096.80x = 640,207.80 × 249,512.40
  4. Step 4: Simplify right side
    427,096.80x = 159,739,784,676.72
  5. Step 5: Solve for x
    x = 159,739,784,676.72/427,096.80
  6. Step 6: Final answer
    x = 374,013.07

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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.