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Finding the Fourth Proportional to 342,022.40, 513,033.60 and 317,139.20

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Solution

The fourth proportional to 342,022.40, 513,033.60 and 317,139.20 is: 475,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,022.40 : 513,033.60 = 317,139.20 : x
  2. Step 2: Convert to fraction form
    342,022.40/513,033.60 = 317,139.20/x
  3. Step 3: Cross multiply
    342,022.40x = 513,033.60 × 317,139.20
  4. Step 4: Simplify right side
    342,022.40x = 162,703,065,477.12
  5. Step 5: Solve for x
    x = 162,703,065,477.12/342,022.40
  6. Step 6: Final answer
    x = 475,708.80

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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.