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Finding the Fourth Proportional to 520,806.64, 718,718.80 and 305,955.76

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Solution

The fourth proportional to 520,806.64, 718,718.80 and 305,955.76 is: 422,222.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,806.64 : 718,718.80 = 305,955.76 : x
  2. Step 2: Convert to fraction form
    520,806.64/718,718.80 = 305,955.76/x
  3. Step 3: Cross multiply
    520,806.64x = 718,718.80 × 305,955.76
  4. Step 4: Simplify right side
    520,806.64x = 219,896,156,680.29
  5. Step 5: Solve for x
    x = 219,896,156,680.29/520,806.64
  6. Step 6: Final answer
    x = 422,222.26

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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.