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Finding the Fourth Proportional to 342,017.20, 513,025.80 and 105,432.40

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Solution

The fourth proportional to 342,017.20, 513,025.80 and 105,432.40 is: 158,148.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,017.20 : 513,025.80 = 105,432.40 : x
  2. Step 2: Convert to fraction form
    342,017.20/513,025.80 = 105,432.40/x
  3. Step 3: Cross multiply
    342,017.20x = 513,025.80 × 105,432.40
  4. Step 4: Simplify right side
    342,017.20x = 54,089,541,355.92
  5. Step 5: Solve for x
    x = 54,089,541,355.92/342,017.20
  6. Step 6: Final answer
    x = 158,148.60

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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.