Home / 287,931.38-397,131.08-211,426.47

Finding the Fourth Proportional to 287,931.38, 397,131.08 and 211,426.47

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Solution

The fourth proportional to 287,931.38, 397,131.08 and 211,426.47 is: 291,611.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,931.38 : 397,131.08 = 211,426.47 : x
  2. Step 2: Convert to fraction form
    287,931.38/397,131.08 = 211,426.47/x
  3. Step 3: Cross multiply
    287,931.38x = 397,131.08 × 211,426.47
  4. Step 4: Simplify right side
    287,931.38x = 83,964,021,314.56
  5. Step 5: Solve for x
    x = 83,964,021,314.56/287,931.38
  6. Step 6: Final answer
    x = 291,611.23

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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.