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Finding the Fourth Proportional to 551,015.20, 760,412.22 and 309,315.28

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Solution

The fourth proportional to 551,015.20, 760,412.22 and 309,315.28 is: 426,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,015.20 : 760,412.22 = 309,315.28 : x
  2. Step 2: Convert to fraction form
    551,015.20/760,412.22 = 309,315.28/x
  3. Step 3: Cross multiply
    551,015.20x = 760,412.22 × 309,315.28
  4. Step 4: Simplify right side
    551,015.20x = 235,207,118,744.72
  5. Step 5: Solve for x
    x = 235,207,118,744.72/551,015.20
  6. Step 6: Final answer
    x = 426,861.40

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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.