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Finding the Fourth Proportional to 528.51, 789.99 and 373.40

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Solution

The fourth proportional to 528.51, 789.99 and 373.40 is: 558.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.51 : 789.99 = 373.40 : x
  2. Step 2: Convert to fraction form
    528.51/789.99 = 373.40/x
  3. Step 3: Cross multiply
    528.51x = 789.99 × 373.40
  4. Step 4: Simplify right side
    528.51x = 294,978.32
  5. Step 5: Solve for x
    x = 294,978.32/528.51
  6. Step 6: Final answer
    x = 558.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.