Home / 646,142.40-969,412.02-330,820.72

Finding the Fourth Proportional to 646,142.40, 969,412.02 and 330,820.72

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Solution

The fourth proportional to 646,142.40, 969,412.02 and 330,820.72 is: 496,332.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,142.40 : 969,412.02 = 330,820.72 : x
  2. Step 2: Convert to fraction form
    646,142.40/969,412.02 = 330,820.72/x
  3. Step 3: Cross multiply
    646,142.40x = 969,412.02 × 330,820.72
  4. Step 4: Simplify right side
    646,142.40x = 320,701,582,433.05
  5. Step 5: Solve for x
    x = 320,701,582,433.05/646,142.40
  6. Step 6: Final answer
    x = 496,332.67

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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.