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Finding the Fourth Proportional to 1,225.94, 1,840.05 and 609.93

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Solution

The fourth proportional to 1,225.94, 1,840.05 and 609.93 is: 915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.94 : 1,840.05 = 609.93 : x
  2. Step 2: Convert to fraction form
    1,225.94/1,840.05 = 609.93/x
  3. Step 3: Cross multiply
    1,225.94x = 1,840.05 × 609.93
  4. Step 4: Simplify right side
    1,225.94x = 1,122,301.70
  5. Step 5: Solve for x
    x = 1,122,301.70/1,225.94
  6. Step 6: Final answer
    x = 915.47

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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.