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Finding the Fourth Proportional to 575,781.40, 863,672.10 and 455,512.60

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Solution

The fourth proportional to 575,781.40, 863,672.10 and 455,512.60 is: 683,268.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    575,781.40 : 863,672.10 = 455,512.60 : x
  2. Step 2: Convert to fraction form
    575,781.40/863,672.10 = 455,512.60/x
  3. Step 3: Cross multiply
    575,781.40x = 863,672.10 × 455,512.60
  4. Step 4: Simplify right side
    575,781.40x = 393,413,523,818.46
  5. Step 5: Solve for x
    x = 393,413,523,818.46/575,781.40
  6. Step 6: Final answer
    x = 683,268.90

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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.