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Finding the Fourth Proportional to 573.48, 790.47 and 386.91

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Solution

The fourth proportional to 573.48, 790.47 and 386.91 is: 533.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.48 : 790.47 = 386.91 : x
  2. Step 2: Convert to fraction form
    573.48/790.47 = 386.91/x
  3. Step 3: Cross multiply
    573.48x = 790.47 × 386.91
  4. Step 4: Simplify right side
    573.48x = 305,840.75
  5. Step 5: Solve for x
    x = 305,840.75/573.48
  6. Step 6: Final answer
    x = 533.31

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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.