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Finding the Fourth Proportional to 315,700.50, 435,810.12 and 201,136.26

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Solution

The fourth proportional to 315,700.50, 435,810.12 and 201,136.26 is: 277,659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,700.50 : 435,810.12 = 201,136.26 : x
  2. Step 2: Convert to fraction form
    315,700.50/435,810.12 = 201,136.26/x
  3. Step 3: Cross multiply
    315,700.50x = 435,810.12 × 201,136.26
  4. Step 4: Simplify right side
    315,700.50x = 87,657,217,606.95
  5. Step 5: Solve for x
    x = 87,657,217,606.95/315,700.50
  6. Step 6: Final answer
    x = 277,659.42

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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.