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Finding the Fourth Proportional to 703,420.31, 970,718.69 and 381,139.13

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Solution

The fourth proportional to 703,420.31, 970,718.69 and 381,139.13 is: 525,971.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,420.31 : 970,718.69 = 381,139.13 : x
  2. Step 2: Convert to fraction form
    703,420.31/970,718.69 = 381,139.13/x
  3. Step 3: Cross multiply
    703,420.31x = 970,718.69 × 381,139.13
  4. Step 4: Simplify right side
    703,420.31x = 369,978,870,222.05
  5. Step 5: Solve for x
    x = 369,978,870,222.05/703,420.31
  6. Step 6: Final answer
    x = 525,971.27

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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.