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Finding the Fourth Proportional to 1,210.01, 1,814.56 and 388.07

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Solution

The fourth proportional to 1,210.01, 1,814.56 and 388.07 is: 581.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.01 : 1,814.56 = 388.07 : x
  2. Step 2: Convert to fraction form
    1,210.01/1,814.56 = 388.07/x
  3. Step 3: Cross multiply
    1,210.01x = 1,814.56 × 388.07
  4. Step 4: Simplify right side
    1,210.01x = 704,176.30
  5. Step 5: Solve for x
    x = 704,176.30/1,210.01
  6. Step 6: Final answer
    x = 581.96

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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.