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Finding the Fourth Proportional to 660,357.84, 990,488.32 and 210,958.08

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Solution

The fourth proportional to 660,357.84, 990,488.32 and 210,958.08 is: 316,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,357.84 : 990,488.32 = 210,958.08 : x
  2. Step 2: Convert to fraction form
    660,357.84/990,488.32 = 210,958.08/x
  3. Step 3: Cross multiply
    660,357.84x = 990,488.32 × 210,958.08
  4. Step 4: Simplify right side
    660,357.84x = 208,951,514,249.63
  5. Step 5: Solve for x
    x = 208,951,514,249.63/660,357.84
  6. Step 6: Final answer
    x = 316,421.65

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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.