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Finding the Fourth Proportional to 551,529.70, 761,069.48 and 309,765.05

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Solution

The fourth proportional to 551,529.70, 761,069.48 and 309,765.05 is: 427,452.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,529.70 : 761,069.48 = 309,765.05 : x
  2. Step 2: Convert to fraction form
    551,529.70/761,069.48 = 309,765.05/x
  3. Step 3: Cross multiply
    551,529.70x = 761,069.48 × 309,765.05
  4. Step 4: Simplify right side
    551,529.70x = 235,752,725,525.67
  5. Step 5: Solve for x
    x = 235,752,725,525.67/551,529.70
  6. Step 6: Final answer
    x = 427,452.46

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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.