Home / 812,814.96-1,220,009.76-392,386.08

Finding the Fourth Proportional to 812,814.96, 1,220,009.76 and 392,386.08

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Solution

The fourth proportional to 812,814.96, 1,220,009.76 and 392,386.08 is: 588,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,814.96 : 1,220,009.76 = 392,386.08 : x
  2. Step 2: Convert to fraction form
    812,814.96/1,220,009.76 = 392,386.08/x
  3. Step 3: Cross multiply
    812,814.96x = 1,220,009.76 × 392,386.08
  4. Step 4: Simplify right side
    812,814.96x = 478,714,847,288.14
  5. Step 5: Solve for x
    x = 478,714,847,288.14/812,814.96
  6. Step 6: Final answer
    x = 588,959.20

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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.