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Finding the Fourth Proportional to 653,240.80, 901,570.80 and 398,739.52

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Solution

The fourth proportional to 653,240.80, 901,570.80 and 398,739.52 is: 550,320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,240.80 : 901,570.80 = 398,739.52 : x
  2. Step 2: Convert to fraction form
    653,240.80/901,570.80 = 398,739.52/x
  3. Step 3: Cross multiply
    653,240.80x = 901,570.80 × 398,739.52
  4. Step 4: Simplify right side
    653,240.80x = 359,491,908,038.02
  5. Step 5: Solve for x
    x = 359,491,908,038.02/653,240.80
  6. Step 6: Final answer
    x = 550,320.66

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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.