Home / 672,070.60-1,008,105.90-639,411.40

Finding the Fourth Proportional to 672,070.60, 1,008,105.90 and 639,411.40

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Solution

The fourth proportional to 672,070.60, 1,008,105.90 and 639,411.40 is: 959,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,070.60 : 1,008,105.90 = 639,411.40 : x
  2. Step 2: Convert to fraction form
    672,070.60/1,008,105.90 = 639,411.40/x
  3. Step 3: Cross multiply
    672,070.60x = 1,008,105.90 × 639,411.40
  4. Step 4: Simplify right side
    672,070.60x = 644,594,404,867.26
  5. Step 5: Solve for x
    x = 644,594,404,867.26/672,070.60
  6. Step 6: Final answer
    x = 959,117.10

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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.