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Finding the Fourth Proportional to 538,526.40, 807,789.60 and 388,449.60

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Solution

The fourth proportional to 538,526.40, 807,789.60 and 388,449.60 is: 582,674.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,526.40 : 807,789.60 = 388,449.60 : x
  2. Step 2: Convert to fraction form
    538,526.40/807,789.60 = 388,449.60/x
  3. Step 3: Cross multiply
    538,526.40x = 807,789.60 × 388,449.60
  4. Step 4: Simplify right side
    538,526.40x = 313,785,547,004.16
  5. Step 5: Solve for x
    x = 313,785,547,004.16/538,526.40
  6. Step 6: Final answer
    x = 582,674.40

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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.