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Finding the Fourth Proportional to 707.33, 975.63 and 485.90

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Solution

The fourth proportional to 707.33, 975.63 and 485.90 is: 670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.33 : 975.63 = 485.90 : x
  2. Step 2: Convert to fraction form
    707.33/975.63 = 485.90/x
  3. Step 3: Cross multiply
    707.33x = 975.63 × 485.90
  4. Step 4: Simplify right side
    707.33x = 474,058.62
  5. Step 5: Solve for x
    x = 474,058.62/707.33
  6. Step 6: Final answer
    x = 670.21

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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.