Home / 1,280,274.32-1,921,488.91-640,386.14

Finding the Fourth Proportional to 1,280,274.32, 1,921,488.91 and 640,386.14

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Solution

The fourth proportional to 1,280,274.32, 1,921,488.91 and 640,386.14 is: 961,118.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,274.32 : 1,921,488.91 = 640,386.14 : x
  2. Step 2: Convert to fraction form
    1,280,274.32/1,921,488.91 = 640,386.14/x
  3. Step 3: Cross multiply
    1,280,274.32x = 1,921,488.91 × 640,386.14
  4. Step 4: Simplify right side
    1,280,274.32x = 1,230,494,854,919.30
  5. Step 5: Solve for x
    x = 1,230,494,854,919.30/1,280,274.32
  6. Step 6: Final answer
    x = 961,118.12

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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.