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Finding the Fourth Proportional to 908,673.78, 1,253,978.39 and 500,790.33

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Solution

The fourth proportional to 908,673.78, 1,253,978.39 and 500,790.33 is: 691,095.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,673.78 : 1,253,978.39 = 500,790.33 : x
  2. Step 2: Convert to fraction form
    908,673.78/1,253,978.39 = 500,790.33/x
  3. Step 3: Cross multiply
    908,673.78x = 1,253,978.39 × 500,790.33
  4. Step 4: Simplify right side
    908,673.78x = 627,980,249,237.02
  5. Step 5: Solve for x
    x = 627,980,249,237.02/908,673.78
  6. Step 6: Final answer
    x = 691,095.38

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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.