Home / 812,970.45-1,121,447.18-640,252.13

Finding the Fourth Proportional to 812,970.45, 1,121,447.18 and 640,252.13

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Solution

The fourth proportional to 812,970.45, 1,121,447.18 and 640,252.13 is: 883,191.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,970.45 : 1,121,447.18 = 640,252.13 : x
  2. Step 2: Convert to fraction form
    812,970.45/1,121,447.18 = 640,252.13/x
  3. Step 3: Cross multiply
    812,970.45x = 1,121,447.18 × 640,252.13
  4. Step 4: Simplify right side
    812,970.45x = 718,008,941,670.89
  5. Step 5: Solve for x
    x = 718,008,941,670.89/812,970.45
  6. Step 6: Final answer
    x = 883,191.93

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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.