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Finding the Fourth Proportional to 427,228.80, 640,940.40 and 249,644.40

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Solution

The fourth proportional to 427,228.80, 640,940.40 and 249,644.40 is: 374,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,228.80 : 640,940.40 = 249,644.40 : x
  2. Step 2: Convert to fraction form
    427,228.80/640,940.40 = 249,644.40/x
  3. Step 3: Cross multiply
    427,228.80x = 640,940.40 × 249,644.40
  4. Step 4: Simplify right side
    427,228.80x = 160,007,181,593.76
  5. Step 5: Solve for x
    x = 160,007,181,593.76/427,228.80
  6. Step 6: Final answer
    x = 374,523.40

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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.