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Finding the Fourth Proportional to 491,806.40, 736,672.80 and 439,275.20

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Solution

The fourth proportional to 491,806.40, 736,672.80 and 439,275.20 is: 657,986.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,806.40 : 736,672.80 = 439,275.20 : x
  2. Step 2: Convert to fraction form
    491,806.40/736,672.80 = 439,275.20/x
  3. Step 3: Cross multiply
    491,806.40x = 736,672.80 × 439,275.20
  4. Step 4: Simplify right side
    491,806.40x = 323,602,091,554.56
  5. Step 5: Solve for x
    x = 323,602,091,554.56/491,806.40
  6. Step 6: Final answer
    x = 657,986.74

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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.