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Finding the Fourth Proportional to 315,987.38, 436,006.52 and 186,931.29

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Solution

The fourth proportional to 315,987.38, 436,006.52 and 186,931.29 is: 257,932.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,987.38 : 436,006.52 = 186,931.29 : x
  2. Step 2: Convert to fraction form
    315,987.38/436,006.52 = 186,931.29/x
  3. Step 3: Cross multiply
    315,987.38x = 436,006.52 × 186,931.29
  4. Step 4: Simplify right side
    315,987.38x = 81,503,261,699.34
  5. Step 5: Solve for x
    x = 81,503,261,699.34/315,987.38
  6. Step 6: Final answer
    x = 257,932.02

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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.