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Finding the Fourth Proportional to 703,421.45, 970,720.23 and 381,140.27

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Solution

The fourth proportional to 703,421.45, 970,720.23 and 381,140.27 is: 525,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,421.45 : 970,720.23 = 381,140.27 : x
  2. Step 2: Convert to fraction form
    703,421.45/970,720.23 = 381,140.27/x
  3. Step 3: Cross multiply
    703,421.45x = 970,720.23 × 381,140.27
  4. Step 4: Simplify right side
    703,421.45x = 369,980,565,703.06
  5. Step 5: Solve for x
    x = 369,980,565,703.06/703,421.45
  6. Step 6: Final answer
    x = 525,972.83

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Double scale
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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.