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Finding the Fourth Proportional to 703.47, 970.85 and 388.77

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Solution

The fourth proportional to 703.47, 970.85 and 388.77 is: 536.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.47 : 970.85 = 388.77 : x
  2. Step 2: Convert to fraction form
    703.47/970.85 = 388.77/x
  3. Step 3: Cross multiply
    703.47x = 970.85 × 388.77
  4. Step 4: Simplify right side
    703.47x = 377,434.69
  5. Step 5: Solve for x
    x = 377,434.69/703.47
  6. Step 6: Final answer
    x = 536.53

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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.