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Finding the Fourth Proportional to 707.99, 1,061.06 and 611.10

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Solution

The fourth proportional to 707.99, 1,061.06 and 611.10 is: 915.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.99 : 1,061.06 = 611.10 : x
  2. Step 2: Convert to fraction form
    707.99/1,061.06 = 611.10/x
  3. Step 3: Cross multiply
    707.99x = 1,061.06 × 611.10
  4. Step 4: Simplify right side
    707.99x = 648,410.71
  5. Step 5: Solve for x
    x = 648,410.71/707.99
  6. Step 6: Final answer
    x = 915.85

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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.