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Finding the Fourth Proportional to 287,451.26, 431,018.18 and 133,409.30

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Solution

The fourth proportional to 287,451.26, 431,018.18 and 133,409.30 is: 200,040.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,451.26 : 431,018.18 = 133,409.30 : x
  2. Step 2: Convert to fraction form
    287,451.26/431,018.18 = 133,409.30/x
  3. Step 3: Cross multiply
    287,451.26x = 431,018.18 × 133,409.30
  4. Step 4: Simplify right side
    287,451.26x = 57,501,833,681.07
  5. Step 5: Solve for x
    x = 57,501,833,681.07/287,451.26
  6. Step 6: Final answer
    x = 200,040.29

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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.