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Finding the Fourth Proportional to 260,345.65, 358,634.82 and 221,980.21

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Solution

The fourth proportional to 260,345.65, 358,634.82 and 221,980.21 is: 305,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,345.65 : 358,634.82 = 221,980.21 : x
  2. Step 2: Convert to fraction form
    260,345.65/358,634.82 = 221,980.21/x
  3. Step 3: Cross multiply
    260,345.65x = 358,634.82 × 221,980.21
  4. Step 4: Simplify right side
    260,345.65x = 79,609,832,656.91
  5. Step 5: Solve for x
    x = 79,609,832,656.91/260,345.65
  6. Step 6: Final answer
    x = 305,785.15

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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.