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Finding the Fourth Proportional to 266,686.12, 399,873.66 and 79,647.40

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Solution

The fourth proportional to 266,686.12, 399,873.66 and 79,647.40 is: 119,424.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,686.12 : 399,873.66 = 79,647.40 : x
  2. Step 2: Convert to fraction form
    266,686.12/399,873.66 = 79,647.40/x
  3. Step 3: Cross multiply
    266,686.12x = 399,873.66 × 79,647.40
  4. Step 4: Simplify right side
    266,686.12x = 31,848,897,347.48
  5. Step 5: Solve for x
    x = 31,848,897,347.48/266,686.12
  6. Step 6: Final answer
    x = 119,424.65

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1.5x scale

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.