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Finding the Fourth Proportional to 703.80, 971.10 and 470.76

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Solution

The fourth proportional to 703.80, 971.10 and 470.76 is: 649.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.80 : 971.10 = 470.76 : x
  2. Step 2: Convert to fraction form
    703.80/971.10 = 470.76/x
  3. Step 3: Cross multiply
    703.80x = 971.10 × 470.76
  4. Step 4: Simplify right side
    703.80x = 457,155.04
  5. Step 5: Solve for x
    x = 457,155.04/703.80
  6. Step 6: Final answer
    x = 649.55

Related Problems

Find fourth proportional to 351.90, 485.55 and 235.38
Half scale
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Double scale
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Similar ratio
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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.