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Finding the Fourth Proportional to 572.98, 790.70 and 310.99

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Solution

The fourth proportional to 572.98, 790.70 and 310.99 is: 429.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.98 : 790.70 = 310.99 : x
  2. Step 2: Convert to fraction form
    572.98/790.70 = 310.99/x
  3. Step 3: Cross multiply
    572.98x = 790.70 × 310.99
  4. Step 4: Simplify right side
    572.98x = 245,900.57
  5. Step 5: Solve for x
    x = 245,900.57/572.98
  6. Step 6: Final answer
    x = 429.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.