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Finding the Fourth Proportional to 569.18, 785.30 and 347.90

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Solution

The fourth proportional to 569.18, 785.30 and 347.90 is: 479.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.18 : 785.30 = 347.90 : x
  2. Step 2: Convert to fraction form
    569.18/785.30 = 347.90/x
  3. Step 3: Cross multiply
    569.18x = 785.30 × 347.90
  4. Step 4: Simplify right side
    569.18x = 273,200.20
  5. Step 5: Solve for x
    x = 273,200.20/569.18
  6. Step 6: Final answer
    x = 479.99

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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.