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Finding the Fourth Proportional to 315,453.02, 435,324.75 and 202,275.50

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Solution

The fourth proportional to 315,453.02, 435,324.75 and 202,275.50 is: 279,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,453.02 : 435,324.75 = 202,275.50 : x
  2. Step 2: Convert to fraction form
    315,453.02/435,324.75 = 202,275.50/x
  3. Step 3: Cross multiply
    315,453.02x = 435,324.75 × 202,275.50
  4. Step 4: Simplify right side
    315,453.02x = 88,055,531,468.63
  5. Step 5: Solve for x
    x = 88,055,531,468.63/315,453.02
  6. Step 6: Final answer
    x = 279,139.92

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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.