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Finding the Fourth Proportional to 1,207.85, 1,666.58 and 703.62

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Solution

The fourth proportional to 1,207.85, 1,666.58 and 703.62 is: 970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.85 : 1,666.58 = 703.62 : x
  2. Step 2: Convert to fraction form
    1,207.85/1,666.58 = 703.62/x
  3. Step 3: Cross multiply
    1,207.85x = 1,666.58 × 703.62
  4. Step 4: Simplify right side
    1,207.85x = 1,172,635.50
  5. Step 5: Solve for x
    x = 1,172,635.50/1,207.85
  6. Step 6: Final answer
    x = 970.85

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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.