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Finding the Fourth Proportional to 343,235.70, 515,145.15 and 153,987.30

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Solution

The fourth proportional to 343,235.70, 515,145.15 and 153,987.30 is: 231,111.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,235.70 : 515,145.15 = 153,987.30 : x
  2. Step 2: Convert to fraction form
    343,235.70/515,145.15 = 153,987.30/x
  3. Step 3: Cross multiply
    343,235.70x = 515,145.15 × 153,987.30
  4. Step 4: Simplify right side
    343,235.70x = 79,325,810,756.60
  5. Step 5: Solve for x
    x = 79,325,810,756.60/343,235.70
  6. Step 6: Final answer
    x = 231,111.77

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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.