Home / 426,005.40-639,008.10-405,269.40

Finding the Fourth Proportional to 426,005.40, 639,008.10 and 405,269.40

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Solution

The fourth proportional to 426,005.40, 639,008.10 and 405,269.40 is: 607,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,005.40 : 639,008.10 = 405,269.40 : x
  2. Step 2: Convert to fraction form
    426,005.40/639,008.10 = 405,269.40/x
  3. Step 3: Cross multiply
    426,005.40x = 639,008.10 × 405,269.40
  4. Step 4: Simplify right side
    426,005.40x = 258,970,429,282.14
  5. Step 5: Solve for x
    x = 258,970,429,282.14/426,005.40
  6. Step 6: Final answer
    x = 607,904.10

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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.