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Finding the Fourth Proportional to 1,457.79, 2,186.46 and 470.57

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Solution

The fourth proportional to 1,457.79, 2,186.46 and 470.57 is: 705.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.79 : 2,186.46 = 470.57 : x
  2. Step 2: Convert to fraction form
    1,457.79/2,186.46 = 470.57/x
  3. Step 3: Cross multiply
    1,457.79x = 2,186.46 × 470.57
  4. Step 4: Simplify right side
    1,457.79x = 1,028,883.85
  5. Step 5: Solve for x
    x = 1,028,883.85/1,457.79
  6. Step 6: Final answer
    x = 705.78

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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.