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Finding the Fourth Proportional to 288,307.12, 397,605.72 and 180,888.88

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Solution

The fourth proportional to 288,307.12, 397,605.72 and 180,888.88 is: 249,464.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,307.12 : 397,605.72 = 180,888.88 : x
  2. Step 2: Convert to fraction form
    288,307.12/397,605.72 = 180,888.88/x
  3. Step 3: Cross multiply
    288,307.12x = 397,605.72 × 180,888.88
  4. Step 4: Simplify right side
    288,307.12x = 71,922,453,372.39
  5. Step 5: Solve for x
    x = 71,922,453,372.39/288,307.12
  6. Step 6: Final answer
    x = 249,464.71

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1.5x scale

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.