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Finding the Fourth Proportional to 291,840.40, 402,940.20 and 220,301.20

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Solution

The fourth proportional to 291,840.40, 402,940.20 and 220,301.20 is: 304,166.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,840.40 : 402,940.20 = 220,301.20 : x
  2. Step 2: Convert to fraction form
    291,840.40/402,940.20 = 220,301.20/x
  3. Step 3: Cross multiply
    291,840.40x = 402,940.20 × 220,301.20
  4. Step 4: Simplify right side
    291,840.40x = 88,768,209,588.24
  5. Step 5: Solve for x
    x = 88,768,209,588.24/291,840.40
  6. Step 6: Final answer
    x = 304,166.97

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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.