Home / 1,121,571.59-1,547,775.09-638,136.73

Finding the Fourth Proportional to 1,121,571.59, 1,547,775.09 and 638,136.73

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Solution

The fourth proportional to 1,121,571.59, 1,547,775.09 and 638,136.73 is: 880,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,571.59 : 1,547,775.09 = 638,136.73 : x
  2. Step 2: Convert to fraction form
    1,121,571.59/1,547,775.09 = 638,136.73/x
  3. Step 3: Cross multiply
    1,121,571.59x = 1,547,775.09 × 638,136.73
  4. Step 4: Simplify right side
    1,121,571.59x = 987,692,123,778.50
  5. Step 5: Solve for x
    x = 987,692,123,778.50/1,121,571.59
  6. Step 6: Final answer
    x = 880,632.26

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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.