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Finding the Fourth Proportional to 551,260.83, 760,818.60 and 309,559.86

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Solution

The fourth proportional to 551,260.83, 760,818.60 and 309,559.86 is: 427,236.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,260.83 : 760,818.60 = 309,559.86 : x
  2. Step 2: Convert to fraction form
    551,260.83/760,818.60 = 309,559.86/x
  3. Step 3: Cross multiply
    551,260.83x = 760,818.60 × 309,559.86
  4. Step 4: Simplify right side
    551,260.83x = 235,518,899,301.40
  5. Step 5: Solve for x
    x = 235,518,899,301.40/551,260.83
  6. Step 6: Final answer
    x = 427,236.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.