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Finding the Fourth Proportional to 551,969.67, 761,739.76 and 310,251.50

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Solution

The fourth proportional to 551,969.67, 761,739.76 and 310,251.50 is: 428,159.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,969.67 : 761,739.76 = 310,251.50 : x
  2. Step 2: Convert to fraction form
    551,969.67/761,739.76 = 310,251.50/x
  3. Step 3: Cross multiply
    551,969.67x = 761,739.76 × 310,251.50
  4. Step 4: Simplify right side
    551,969.67x = 236,330,903,149.64
  5. Step 5: Solve for x
    x = 236,330,903,149.64/551,969.67
  6. Step 6: Final answer
    x = 428,159.22

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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.