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Finding the Fourth Proportional to 707.40, 975.38 and 486.52

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Solution

The fourth proportional to 707.40, 975.38 and 486.52 is: 670.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.40 : 975.38 = 486.52 : x
  2. Step 2: Convert to fraction form
    707.40/975.38 = 486.52/x
  3. Step 3: Cross multiply
    707.40x = 975.38 × 486.52
  4. Step 4: Simplify right side
    707.40x = 474,541.88
  5. Step 5: Solve for x
    x = 474,541.88/707.40
  6. Step 6: Final answer
    x = 670.83

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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.