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Finding the Fourth Proportional to 218,129.10, 305,588.10 and 218,129.10

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Solution

The fourth proportional to 218,129.10, 305,588.10 and 218,129.10 is: 305,588.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,129.10 : 305,588.10 = 218,129.10 : x
  2. Step 2: Convert to fraction form
    218,129.10/305,588.10 = 218,129.10/x
  3. Step 3: Cross multiply
    218,129.10x = 305,588.10 × 218,129.10
  4. Step 4: Simplify right side
    218,129.10x = 66,657,657,223.71
  5. Step 5: Solve for x
    x = 66,657,657,223.71/218,129.10
  6. Step 6: Final answer
    x = 305,588.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.