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Finding the Fourth Proportional to 900,555, 1,242,775.68 and 492,648.04

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Solution

The fourth proportional to 900,555, 1,242,775.68 and 492,648.04 is: 679,859.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,555 : 1,242,775.68 = 492,648.04 : x
  2. Step 2: Convert to fraction form
    900,555/1,242,775.68 = 492,648.04/x
  3. Step 3: Cross multiply
    900,555x = 1,242,775.68 × 492,648.04
  4. Step 4: Simplify right side
    900,555x = 612,251,002,911.67
  5. Step 5: Solve for x
    x = 612,251,002,911.67/900,555
  6. Step 6: Final answer
    x = 679,859.65

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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.