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Finding the Fourth Proportional to 528.75, 729.23 and 430.34

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Solution

The fourth proportional to 528.75, 729.23 and 430.34 is: 593.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.75 : 729.23 = 430.34 : x
  2. Step 2: Convert to fraction form
    528.75/729.23 = 430.34/x
  3. Step 3: Cross multiply
    528.75x = 729.23 × 430.34
  4. Step 4: Simplify right side
    528.75x = 313,814.30
  5. Step 5: Solve for x
    x = 313,814.30/528.75
  6. Step 6: Final answer
    x = 593.50

Related Problems

Find fourth proportional to 264.38, 364.61 and 215.17
Half scale
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Double scale
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Similar ratio
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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.