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Finding the Fourth Proportional to 522,987.64, 721,700.20 and 290,400.12

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Solution

The fourth proportional to 522,987.64, 721,700.20 and 290,400.12 is: 400,739.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,987.64 : 721,700.20 = 290,400.12 : x
  2. Step 2: Convert to fraction form
    522,987.64/721,700.20 = 290,400.12/x
  3. Step 3: Cross multiply
    522,987.64x = 721,700.20 × 290,400.12
  4. Step 4: Simplify right side
    522,987.64x = 209,581,824,684.02
  5. Step 5: Solve for x
    x = 209,581,824,684.02/522,987.64
  6. Step 6: Final answer
    x = 400,739.54

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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.