Home / 812,985.74-1,121,468.27-640,267.41

Finding the Fourth Proportional to 812,985.74, 1,121,468.27 and 640,267.41

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Solution

The fourth proportional to 812,985.74, 1,121,468.27 and 640,267.41 is: 883,213.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,985.74 : 1,121,468.27 = 640,267.41 : x
  2. Step 2: Convert to fraction form
    812,985.74/1,121,468.27 = 640,267.41/x
  3. Step 3: Cross multiply
    812,985.74x = 1,121,468.27 × 640,267.41
  4. Step 4: Simplify right side
    812,985.74x = 718,039,581,428.74
  5. Step 5: Solve for x
    x = 718,039,581,428.74/812,985.74
  6. Step 6: Final answer
    x = 883,213.01

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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.