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Finding the Fourth Proportional to 611,570.40, 917,027.55 and 256,182.90

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Solution

The fourth proportional to 611,570.40, 917,027.55 and 256,182.90 is: 384,136.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,570.40 : 917,027.55 = 256,182.90 : x
  2. Step 2: Convert to fraction form
    611,570.40/917,027.55 = 256,182.90/x
  3. Step 3: Cross multiply
    611,570.40x = 917,027.55 × 256,182.90
  4. Step 4: Simplify right side
    611,570.40x = 234,926,777,138.90
  5. Step 5: Solve for x
    x = 234,926,777,138.90/611,570.40
  6. Step 6: Final answer
    x = 384,136.93

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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.