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Finding the Fourth Proportional to 343,485.90, 515,228.85 and 90,765.90

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Solution

The fourth proportional to 343,485.90, 515,228.85 and 90,765.90 is: 136,148.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,485.90 : 515,228.85 = 90,765.90 : x
  2. Step 2: Convert to fraction form
    343,485.90/515,228.85 = 90,765.90/x
  3. Step 3: Cross multiply
    343,485.90x = 515,228.85 × 90,765.90
  4. Step 4: Simplify right side
    343,485.90x = 46,765,210,276.22
  5. Step 5: Solve for x
    x = 46,765,210,276.22/343,485.90
  6. Step 6: Final answer
    x = 136,148.85

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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.