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Finding the Fourth Proportional to 980.05, 1,470.07 and 569.99

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Solution

The fourth proportional to 980.05, 1,470.07 and 569.99 is: 854.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    980.05 : 1,470.07 = 569.99 : x
  2. Step 2: Convert to fraction form
    980.05/1,470.07 = 569.99/x
  3. Step 3: Cross multiply
    980.05x = 1,470.07 × 569.99
  4. Step 4: Simplify right side
    980.05x = 837,922.92
  5. Step 5: Solve for x
    x = 837,922.92/980.05
  6. Step 6: Final answer
    x = 854.98

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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.