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Finding the Fourth Proportional to 620,726.74, 931,071.68 and 171,474.64

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Solution

The fourth proportional to 620,726.74, 931,071.68 and 171,474.64 is: 257,206.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,726.74 : 931,071.68 = 171,474.64 : x
  2. Step 2: Convert to fraction form
    620,726.74/931,071.68 = 171,474.64/x
  3. Step 3: Cross multiply
    620,726.74x = 931,071.68 × 171,474.64
  4. Step 4: Simplify right side
    620,726.74x = 159,655,181,142.20
  5. Step 5: Solve for x
    x = 159,655,181,142.20/620,726.74
  6. Step 6: Final answer
    x = 257,206.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.