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Finding the Fourth Proportional to 618, 920.46 and 587.16

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Solution

The fourth proportional to 618, 920.46 and 587.16 is: 874.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    618 : 920.46 = 587.16 : x
  2. Step 2: Convert to fraction form
    618/920.46 = 587.16/x
  3. Step 3: Cross multiply
    618x = 920.46 × 587.16
  4. Step 4: Simplify right side
    618x = 540,457.29
  5. Step 5: Solve for x
    x = 540,457.29/618
  6. Step 6: Final answer
    x = 874.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.