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Finding the Fourth Proportional to 707.79, 976.55 and 445.89

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Solution

The fourth proportional to 707.79, 976.55 and 445.89 is: 615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.79 : 976.55 = 445.89 : x
  2. Step 2: Convert to fraction form
    707.79/976.55 = 445.89/x
  3. Step 3: Cross multiply
    707.79x = 976.55 × 445.89
  4. Step 4: Simplify right side
    707.79x = 435,431.65
  5. Step 5: Solve for x
    x = 435,431.65/707.79
  6. Step 6: Final answer
    x = 615.20

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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.