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Finding the Fourth Proportional to 707.46, 972.99 and 619.98

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Solution

The fourth proportional to 707.46, 972.99 and 619.98 is: 852.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.46 : 972.99 = 619.98 : x
  2. Step 2: Convert to fraction form
    707.46/972.99 = 619.98/x
  3. Step 3: Cross multiply
    707.46x = 972.99 × 619.98
  4. Step 4: Simplify right side
    707.46x = 603,234.34
  5. Step 5: Solve for x
    x = 603,234.34/707.46
  6. Step 6: Final answer
    x = 852.68

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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.