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Finding the Fourth Proportional to 606.40, 910.70 and 530.80

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Solution

The fourth proportional to 606.40, 910.70 and 530.80 is: 797.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.40 : 910.70 = 530.80 : x
  2. Step 2: Convert to fraction form
    606.40/910.70 = 530.80/x
  3. Step 3: Cross multiply
    606.40x = 910.70 × 530.80
  4. Step 4: Simplify right side
    606.40x = 483,399.56
  5. Step 5: Solve for x
    x = 483,399.56/606.40
  6. Step 6: Final answer
    x = 797.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.