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Finding the Fourth Proportional to 691,871.56, 954,784.02 and 390,064.84

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Solution

The fourth proportional to 691,871.56, 954,784.02 and 390,064.84 is: 538,290.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,871.56 : 954,784.02 = 390,064.84 : x
  2. Step 2: Convert to fraction form
    691,871.56/954,784.02 = 390,064.84/x
  3. Step 3: Cross multiply
    691,871.56x = 954,784.02 × 390,064.84
  4. Step 4: Simplify right side
    691,871.56x = 372,427,675,995.86
  5. Step 5: Solve for x
    x = 372,427,675,995.86/691,871.56
  6. Step 6: Final answer
    x = 538,290.19

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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.