Home / 513,621.80-770,432.70-345,660.20

Finding the Fourth Proportional to 513,621.80, 770,432.70 and 345,660.20

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Solution

The fourth proportional to 513,621.80, 770,432.70 and 345,660.20 is: 518,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,621.80 : 770,432.70 = 345,660.20 : x
  2. Step 2: Convert to fraction form
    513,621.80/770,432.70 = 345,660.20/x
  3. Step 3: Cross multiply
    513,621.80x = 770,432.70 × 345,660.20
  4. Step 4: Simplify right side
    513,621.80x = 266,307,921,168.54
  5. Step 5: Solve for x
    x = 266,307,921,168.54/513,621.80
  6. Step 6: Final answer
    x = 518,490.30

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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.