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Finding the Fourth Proportional to 709.40, 1,064.03 and 435.35

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Solution

The fourth proportional to 709.40, 1,064.03 and 435.35 is: 652.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.40 : 1,064.03 = 435.35 : x
  2. Step 2: Convert to fraction form
    709.40/1,064.03 = 435.35/x
  3. Step 3: Cross multiply
    709.40x = 1,064.03 × 435.35
  4. Step 4: Simplify right side
    709.40x = 463,217.96
  5. Step 5: Solve for x
    x = 463,217.96/709.40
  6. Step 6: Final answer
    x = 652.98

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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.