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Finding the Fourth Proportional to 707.40, 976.02 and 412.56

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Solution

The fourth proportional to 707.40, 976.02 and 412.56 is: 569.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.40 : 976.02 = 412.56 : x
  2. Step 2: Convert to fraction form
    707.40/976.02 = 412.56/x
  3. Step 3: Cross multiply
    707.40x = 976.02 × 412.56
  4. Step 4: Simplify right side
    707.40x = 402,666.81
  5. Step 5: Solve for x
    x = 402,666.81/707.40
  6. Step 6: Final answer
    x = 569.22

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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.