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Finding the Fourth Proportional to 428,561.01, 642,948.58 and 302,447.43

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Solution

The fourth proportional to 428,561.01, 642,948.58 and 302,447.43 is: 453,746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,561.01 : 642,948.58 = 302,447.43 : x
  2. Step 2: Convert to fraction form
    428,561.01/642,948.58 = 302,447.43/x
  3. Step 3: Cross multiply
    428,561.01x = 642,948.58 × 302,447.43
  4. Step 4: Simplify right side
    428,561.01x = 194,458,142,428.41
  5. Step 5: Solve for x
    x = 194,458,142,428.41/428,561.01
  6. Step 6: Final answer
    x = 453,746.70

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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.