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Finding the Fourth Proportional to 572.60, 857.10 and 554.60

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Solution

The fourth proportional to 572.60, 857.10 and 554.60 is: 830.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.60 : 857.10 = 554.60 : x
  2. Step 2: Convert to fraction form
    572.60/857.10 = 554.60/x
  3. Step 3: Cross multiply
    572.60x = 857.10 × 554.60
  4. Step 4: Simplify right side
    572.60x = 475,347.66
  5. Step 5: Solve for x
    x = 475,347.66/572.60
  6. Step 6: Final answer
    x = 830.16

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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.