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Finding the Fourth Proportional to 522,465.60, 720,455.04 and 386,784.12

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Solution

The fourth proportional to 522,465.60, 720,455.04 and 386,784.12 is: 533,356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,465.60 : 720,455.04 = 386,784.12 : x
  2. Step 2: Convert to fraction form
    522,465.60/720,455.04 = 386,784.12/x
  3. Step 3: Cross multiply
    522,465.60x = 720,455.04 × 386,784.12
  4. Step 4: Simplify right side
    522,465.60x = 278,660,568,645.97
  5. Step 5: Solve for x
    x = 278,660,568,645.97/522,465.60
  6. Step 6: Final answer
    x = 533,356.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.