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Finding the Fourth Proportional to 343,506.40, 515,259.60 and 90,786.40

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Solution

The fourth proportional to 343,506.40, 515,259.60 and 90,786.40 is: 136,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,506.40 : 515,259.60 = 90,786.40 : x
  2. Step 2: Convert to fraction form
    343,506.40/515,259.60 = 90,786.40/x
  3. Step 3: Cross multiply
    343,506.40x = 515,259.60 × 90,786.40
  4. Step 4: Simplify right side
    343,506.40x = 46,778,564,149.44
  5. Step 5: Solve for x
    x = 46,778,564,149.44/343,506.40
  6. Step 6: Final answer
    x = 136,179.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.