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Finding the Fourth Proportional to 522,701.40, 783,245.70 and 388,954.20

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Solution

The fourth proportional to 522,701.40, 783,245.70 and 388,954.20 is: 582,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,701.40 : 783,245.70 = 388,954.20 : x
  2. Step 2: Convert to fraction form
    522,701.40/783,245.70 = 388,954.20/x
  3. Step 3: Cross multiply
    522,701.40x = 783,245.70 × 388,954.20
  4. Step 4: Simplify right side
    522,701.40x = 304,646,704,646.94
  5. Step 5: Solve for x
    x = 304,646,704,646.94/522,701.40
  6. Step 6: Final answer
    x = 582,831.24

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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.