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Finding the Fourth Proportional to 620,711.76, 931,049.18 and 171,459.59

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Solution

The fourth proportional to 620,711.76, 931,049.18 and 171,459.59 is: 257,184.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,711.76 : 931,049.18 = 171,459.59 : x
  2. Step 2: Convert to fraction form
    620,711.76/931,049.18 = 171,459.59/x
  3. Step 3: Cross multiply
    620,711.76x = 931,049.18 × 171,459.59
  4. Step 4: Simplify right side
    620,711.76x = 159,637,306,767.53
  5. Step 5: Solve for x
    x = 159,637,306,767.53/620,711.76
  6. Step 6: Final answer
    x = 257,184.28

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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.