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Finding the Fourth Proportional to 501.91, 690.99 and 436.39

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Solution

The fourth proportional to 501.91, 690.99 and 436.39 is: 600.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.91 : 690.99 = 436.39 : x
  2. Step 2: Convert to fraction form
    501.91/690.99 = 436.39/x
  3. Step 3: Cross multiply
    501.91x = 690.99 × 436.39
  4. Step 4: Simplify right side
    501.91x = 301,541.13
  5. Step 5: Solve for x
    x = 301,541.13/501.91
  6. Step 6: Final answer
    x = 600.79

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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.