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Finding the Fourth Proportional to 607,051.40, 911,127.90 and 307,740.20

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Solution

The fourth proportional to 607,051.40, 911,127.90 and 307,740.20 is: 461,889.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,051.40 : 911,127.90 = 307,740.20 : x
  2. Step 2: Convert to fraction form
    607,051.40/911,127.90 = 307,740.20/x
  3. Step 3: Cross multiply
    607,051.40x = 911,127.90 × 307,740.20
  4. Step 4: Simplify right side
    607,051.40x = 280,390,682,171.58
  5. Step 5: Solve for x
    x = 280,390,682,171.58/607,051.40
  6. Step 6: Final answer
    x = 461,889.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.