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Finding the Fourth Proportional to 551,539.08, 761,041.05 and 309,775.35

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Solution

The fourth proportional to 551,539.08, 761,041.05 and 309,775.35 is: 427,443.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,539.08 : 761,041.05 = 309,775.35 : x
  2. Step 2: Convert to fraction form
    551,539.08/761,041.05 = 309,775.35/x
  3. Step 3: Cross multiply
    551,539.08x = 761,041.05 × 309,775.35
  4. Step 4: Simplify right side
    551,539.08x = 235,751,757,628.12
  5. Step 5: Solve for x
    x = 235,751,757,628.12/551,539.08
  6. Step 6: Final answer
    x = 427,443.43

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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.