Home / 905,412.78-1,249,469.28-497,540.90

Finding the Fourth Proportional to 905,412.78, 1,249,469.28 and 497,540.90

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Solution

The fourth proportional to 905,412.78, 1,249,469.28 and 497,540.90 is: 686,606.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,412.78 : 1,249,469.28 = 497,540.90 : x
  2. Step 2: Convert to fraction form
    905,412.78/1,249,469.28 = 497,540.90/x
  3. Step 3: Cross multiply
    905,412.78x = 1,249,469.28 × 497,540.90
  4. Step 4: Simplify right side
    905,412.78x = 621,662,070,093.55
  5. Step 5: Solve for x
    x = 621,662,070,093.55/905,412.78
  6. Step 6: Final answer
    x = 686,606.25

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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.