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Finding the Fourth Proportional to 707.03, 975.29 and 485.60

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Solution

The fourth proportional to 707.03, 975.29 and 485.60 is: 669.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.03 : 975.29 = 485.60 : x
  2. Step 2: Convert to fraction form
    707.03/975.29 = 485.60/x
  3. Step 3: Cross multiply
    707.03x = 975.29 × 485.60
  4. Step 4: Simplify right side
    707.03x = 473,596.25
  5. Step 5: Solve for x
    x = 473,596.25/707.03
  6. Step 6: Final answer
    x = 669.84

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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.