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Finding the Fourth Proportional to 570.80, 856.38 and 339.95

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Solution

The fourth proportional to 570.80, 856.38 and 339.95 is: 510.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.80 : 856.38 = 339.95 : x
  2. Step 2: Convert to fraction form
    570.80/856.38 = 339.95/x
  3. Step 3: Cross multiply
    570.80x = 856.38 × 339.95
  4. Step 4: Simplify right side
    570.80x = 291,126.38
  5. Step 5: Solve for x
    x = 291,126.38/570.80
  6. Step 6: Final answer
    x = 510.03

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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.