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Finding the Fourth Proportional to 715.37, 987.09 and 435.55

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Solution

The fourth proportional to 715.37, 987.09 and 435.55 is: 600.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.37 : 987.09 = 435.55 : x
  2. Step 2: Convert to fraction form
    715.37/987.09 = 435.55/x
  3. Step 3: Cross multiply
    715.37x = 987.09 × 435.55
  4. Step 4: Simplify right side
    715.37x = 429,927.05
  5. Step 5: Solve for x
    x = 429,927.05/715.37
  6. Step 6: Final answer
    x = 600.99

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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.