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Finding the Fourth Proportional to 707.48, 1,060.19 and 520.93

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Solution

The fourth proportional to 707.48, 1,060.19 and 520.93 is: 780.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.48 : 1,060.19 = 520.93 : x
  2. Step 2: Convert to fraction form
    707.48/1,060.19 = 520.93/x
  3. Step 3: Cross multiply
    707.48x = 1,060.19 × 520.93
  4. Step 4: Simplify right side
    707.48x = 552,284.78
  5. Step 5: Solve for x
    x = 552,284.78/707.48
  6. Step 6: Final answer
    x = 780.64

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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.