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Finding the Fourth Proportional to 343,432.20, 515,148.30 and 156,808.20

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Solution

The fourth proportional to 343,432.20, 515,148.30 and 156,808.20 is: 235,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,432.20 : 515,148.30 = 156,808.20 : x
  2. Step 2: Convert to fraction form
    343,432.20/515,148.30 = 156,808.20/x
  3. Step 3: Cross multiply
    343,432.20x = 515,148.30 × 156,808.20
  4. Step 4: Simplify right side
    343,432.20x = 80,779,477,656.06
  5. Step 5: Solve for x
    x = 80,779,477,656.06/343,432.20
  6. Step 6: Final answer
    x = 235,212.30

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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.