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Finding the Fourth Proportional to 528.65, 729.57 and 458.18

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Solution

The fourth proportional to 528.65, 729.57 and 458.18 is: 632.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.65 : 729.57 = 458.18 : x
  2. Step 2: Convert to fraction form
    528.65/729.57 = 458.18/x
  3. Step 3: Cross multiply
    528.65x = 729.57 × 458.18
  4. Step 4: Simplify right side
    528.65x = 334,274.38
  5. Step 5: Solve for x
    x = 334,274.38/528.65
  6. Step 6: Final answer
    x = 632.32

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1.5x scale

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.