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Finding the Fourth Proportional to 315,375.78, 435,315.12 and 194,554.74

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Solution

The fourth proportional to 315,375.78, 435,315.12 and 194,554.74 is: 268,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,375.78 : 435,315.12 = 194,554.74 : x
  2. Step 2: Convert to fraction form
    315,375.78/435,315.12 = 194,554.74/x
  3. Step 3: Cross multiply
    315,375.78x = 435,315.12 × 194,554.74
  4. Step 4: Simplify right side
    315,375.78x = 84,692,619,989.67
  5. Step 5: Solve for x
    x = 84,692,619,989.67/315,375.78
  6. Step 6: Final answer
    x = 268,545.10

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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.