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Finding the Fourth Proportional to 570.69, 856.70 and 456.53

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Solution

The fourth proportional to 570.69, 856.70 and 456.53 is: 685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.69 : 856.70 = 456.53 : x
  2. Step 2: Convert to fraction form
    570.69/856.70 = 456.53/x
  3. Step 3: Cross multiply
    570.69x = 856.70 × 456.53
  4. Step 4: Simplify right side
    570.69x = 391,106.97
  5. Step 5: Solve for x
    x = 391,106.97/570.69
  6. Step 6: Final answer
    x = 685.32

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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.