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Finding the Fourth Proportional to 653,146.74, 901,440.90 and 398,645.82

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Solution

The fourth proportional to 653,146.74, 901,440.90 and 398,645.82 is: 550,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,146.74 : 901,440.90 = 398,645.82 : x
  2. Step 2: Convert to fraction form
    653,146.74/901,440.90 = 398,645.82/x
  3. Step 3: Cross multiply
    653,146.74x = 901,440.90 × 398,645.82
  4. Step 4: Simplify right side
    653,146.74x = 359,355,646,762.04
  5. Step 5: Solve for x
    x = 359,355,646,762.04/653,146.74
  6. Step 6: Final answer
    x = 550,191.29

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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.