Home / 630,255.36-869,504.54-388,117.56

Finding the Fourth Proportional to 630,255.36, 869,504.54 and 388,117.56

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Solution

The fourth proportional to 630,255.36, 869,504.54 and 388,117.56 is: 535,449.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,255.36 : 869,504.54 = 388,117.56 : x
  2. Step 2: Convert to fraction form
    630,255.36/869,504.54 = 388,117.56/x
  3. Step 3: Cross multiply
    630,255.36x = 869,504.54 × 388,117.56
  4. Step 4: Simplify right side
    630,255.36x = 337,469,981,444.02
  5. Step 5: Solve for x
    x = 337,469,981,444.02/630,255.36
  6. Step 6: Final answer
    x = 535,449.60

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1.5x scale

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.