Home / 653,397.40-901,786.02-398,896.36

Finding the Fourth Proportional to 653,397.40, 901,786.02 and 398,896.36

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Solution

The fourth proportional to 653,397.40, 901,786.02 and 398,896.36 is: 550,536.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,397.40 : 901,786.02 = 398,896.36 : x
  2. Step 2: Convert to fraction form
    653,397.40/901,786.02 = 398,896.36/x
  3. Step 3: Cross multiply
    653,397.40x = 901,786.02 × 398,896.36
  4. Step 4: Simplify right side
    653,397.40x = 359,719,160,876.89
  5. Step 5: Solve for x
    x = 359,719,160,876.89/653,397.40
  6. Step 6: Final answer
    x = 550,536.57

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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.