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Finding the Fourth Proportional to 402,874.60, 604,311.90 and 377,991.40

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Solution

The fourth proportional to 402,874.60, 604,311.90 and 377,991.40 is: 566,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,874.60 : 604,311.90 = 377,991.40 : x
  2. Step 2: Convert to fraction form
    402,874.60/604,311.90 = 377,991.40/x
  3. Step 3: Cross multiply
    402,874.60x = 604,311.90 × 377,991.40
  4. Step 4: Simplify right side
    402,874.60x = 228,424,701,117.66
  5. Step 5: Solve for x
    x = 228,424,701,117.66/402,874.60
  6. Step 6: Final answer
    x = 566,987.10

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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.