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Finding the Fourth Proportional to 315,366.36, 435,139.08 and 200,603.28

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Solution

The fourth proportional to 315,366.36, 435,139.08 and 200,603.28 is: 276,790.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,366.36 : 435,139.08 = 200,603.28 : x
  2. Step 2: Convert to fraction form
    315,366.36/435,139.08 = 200,603.28/x
  3. Step 3: Cross multiply
    315,366.36x = 435,139.08 × 200,603.28
  4. Step 4: Simplify right side
    315,366.36x = 87,290,326,704.18
  5. Step 5: Solve for x
    x = 87,290,326,704.18/315,366.36
  6. Step 6: Final answer
    x = 276,790.23

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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.