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Finding the Fourth Proportional to 528.69, 728.80 and 342.16

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Solution

The fourth proportional to 528.69, 728.80 and 342.16 is: 471.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.69 : 728.80 = 342.16 : x
  2. Step 2: Convert to fraction form
    528.69/728.80 = 342.16/x
  3. Step 3: Cross multiply
    528.69x = 728.80 × 342.16
  4. Step 4: Simplify right side
    528.69x = 249,366.21
  5. Step 5: Solve for x
    x = 249,366.21/528.69
  6. Step 6: Final answer
    x = 471.67

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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.