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Finding the Fourth Proportional to 356,352.80, 491,651.20 and 242,978.72

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Solution

The fourth proportional to 356,352.80, 491,651.20 and 242,978.72 is: 335,231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,352.80 : 491,651.20 = 242,978.72 : x
  2. Step 2: Convert to fraction form
    356,352.80/491,651.20 = 242,978.72/x
  3. Step 3: Cross multiply
    356,352.80x = 491,651.20 × 242,978.72
  4. Step 4: Simplify right side
    356,352.80x = 119,460,779,262.46
  5. Step 5: Solve for x
    x = 119,460,779,262.46/356,352.80
  6. Step 6: Final answer
    x = 335,231.77

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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.