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Finding the Fourth Proportional to 703,421.07, 970,719.72 and 381,139.89

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Solution

The fourth proportional to 703,421.07, 970,719.72 and 381,139.89 is: 525,972.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,421.07 : 970,719.72 = 381,139.89 : x
  2. Step 2: Convert to fraction form
    703,421.07/970,719.72 = 381,139.89/x
  3. Step 3: Cross multiply
    703,421.07x = 970,719.72 × 381,139.89
  4. Step 4: Simplify right side
    703,421.07x = 369,980,007,301.63
  5. Step 5: Solve for x
    x = 369,980,007,301.63/703,421.07
  6. Step 6: Final answer
    x = 525,972.31

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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.