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Finding the Fourth Proportional to 486,479.12, 671,453.16 and 285,339.92

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Solution

The fourth proportional to 486,479.12, 671,453.16 and 285,339.92 is: 393,834.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,479.12 : 671,453.16 = 285,339.92 : x
  2. Step 2: Convert to fraction form
    486,479.12/671,453.16 = 285,339.92/x
  3. Step 3: Cross multiply
    486,479.12x = 671,453.16 × 285,339.92
  4. Step 4: Simplify right side
    486,479.12x = 191,592,390,958.15
  5. Step 5: Solve for x
    x = 191,592,390,958.15/486,479.12
  6. Step 6: Final answer
    x = 393,834.77

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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.