Home / 786,419.89-1,085,249.08-442,255.71

Finding the Fourth Proportional to 786,419.89, 1,085,249.08 and 442,255.71

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Solution

The fourth proportional to 786,419.89, 1,085,249.08 and 442,255.71 is: 610,307.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,419.89 : 1,085,249.08 = 442,255.71 : x
  2. Step 2: Convert to fraction form
    786,419.89/1,085,249.08 = 442,255.71/x
  3. Step 3: Cross multiply
    786,419.89x = 1,085,249.08 × 442,255.71
  4. Step 4: Simplify right side
    786,419.89x = 479,957,607,024.75
  5. Step 5: Solve for x
    x = 479,957,607,024.75/786,419.89
  6. Step 6: Final answer
    x = 610,307.06

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Double scale
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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.