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Finding the Fourth Proportional to 703,421.82, 970,720.76 and 381,140.64

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Solution

The fourth proportional to 703,421.82, 970,720.76 and 381,140.64 is: 525,973.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,421.82 : 970,720.76 = 381,140.64 : x
  2. Step 2: Convert to fraction form
    703,421.82/970,720.76 = 381,140.64/x
  3. Step 3: Cross multiply
    703,421.82x = 970,720.76 × 381,140.64
  4. Step 4: Simplify right side
    703,421.82x = 369,981,129,821.98
  5. Step 5: Solve for x
    x = 369,981,129,821.98/703,421.82
  6. Step 6: Final answer
    x = 525,973.35

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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.