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Finding the Fourth Proportional to 528.80, 730.50 and 507.20

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Solution

The fourth proportional to 528.80, 730.50 and 507.20 is: 700.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.80 : 730.50 = 507.20 : x
  2. Step 2: Convert to fraction form
    528.80/730.50 = 507.20/x
  3. Step 3: Cross multiply
    528.80x = 730.50 × 507.20
  4. Step 4: Simplify right side
    528.80x = 370,509.60
  5. Step 5: Solve for x
    x = 370,509.60/528.80
  6. Step 6: Final answer
    x = 700.66

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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.