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Finding the Fourth Proportional to 528.48, 786.48 and 509.04

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Solution

The fourth proportional to 528.48, 786.48 and 509.04 is: 757.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.48 : 786.48 = 509.04 : x
  2. Step 2: Convert to fraction form
    528.48/786.48 = 509.04/x
  3. Step 3: Cross multiply
    528.48x = 786.48 × 509.04
  4. Step 4: Simplify right side
    528.48x = 400,349.78
  5. Step 5: Solve for x
    x = 400,349.78/528.48
  6. Step 6: Final answer
    x = 757.55

Related Problems

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Double scale
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1.5x scale

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.