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Finding the Fourth Proportional to 315,968.04, 436,036.86 and 188,640.90

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Solution

The fourth proportional to 315,968.04, 436,036.86 and 188,640.90 is: 260,325.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,968.04 : 436,036.86 = 188,640.90 : x
  2. Step 2: Convert to fraction form
    315,968.04/436,036.86 = 188,640.90/x
  3. Step 3: Cross multiply
    315,968.04x = 436,036.86 × 188,640.90
  4. Step 4: Simplify right side
    315,968.04x = 82,254,385,703.57
  5. Step 5: Solve for x
    x = 82,254,385,703.57/315,968.04
  6. Step 6: Final answer
    x = 260,325.02

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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.