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Finding the Fourth Proportional to 427,117.80, 640,773.90 and 249,533.40

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Solution

The fourth proportional to 427,117.80, 640,773.90 and 249,533.40 is: 374,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,117.80 : 640,773.90 = 249,533.40 : x
  2. Step 2: Convert to fraction form
    427,117.80/640,773.90 = 249,533.40/x
  3. Step 3: Cross multiply
    427,117.80x = 640,773.90 × 249,533.40
  4. Step 4: Simplify right side
    427,117.80x = 159,894,489,898.26
  5. Step 5: Solve for x
    x = 159,894,489,898.26/427,117.80
  6. Step 6: Final answer
    x = 374,356.89

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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.