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Finding the Fourth Proportional to 328,605.30, 490,530.87 and 288,747.23

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Solution

The fourth proportional to 328,605.30, 490,530.87 and 288,747.23 is: 431,032.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,605.30 : 490,530.87 = 288,747.23 : x
  2. Step 2: Convert to fraction form
    328,605.30/490,530.87 = 288,747.23/x
  3. Step 3: Cross multiply
    328,605.30x = 490,530.87 × 288,747.23
  4. Step 4: Simplify right side
    328,605.30x = 141,639,427,489.34
  5. Step 5: Solve for x
    x = 141,639,427,489.34/328,605.30
  6. Step 6: Final answer
    x = 431,032.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.