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Finding the Fourth Proportional to 620,718.93, 931,151.30 and 221,416.47

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Solution

The fourth proportional to 620,718.93, 931,151.30 and 221,416.47 is: 332,150.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,718.93 : 931,151.30 = 221,416.47 : x
  2. Step 2: Convert to fraction form
    620,718.93/931,151.30 = 221,416.47/x
  3. Step 3: Cross multiply
    620,718.93x = 931,151.30 × 221,416.47
  4. Step 4: Simplify right side
    620,718.93x = 206,172,232,774.83
  5. Step 5: Solve for x
    x = 206,172,232,774.83/620,718.93
  6. Step 6: Final answer
    x = 332,150.71

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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.