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Finding the Fourth Proportional to 570.90, 855.54 and 553.35

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Solution

The fourth proportional to 570.90, 855.54 and 553.35 is: 829.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.90 : 855.54 = 553.35 : x
  2. Step 2: Convert to fraction form
    570.90/855.54 = 553.35/x
  3. Step 3: Cross multiply
    570.90x = 855.54 × 553.35
  4. Step 4: Simplify right side
    570.90x = 473,413.06
  5. Step 5: Solve for x
    x = 473,413.06/570.90
  6. Step 6: Final answer
    x = 829.24

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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.