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Finding the Fourth Proportional to 310,545.50, 428,878.08 and 214,000.39

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Solution

The fourth proportional to 310,545.50, 428,878.08 and 214,000.39 is: 295,544.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,545.50 : 428,878.08 = 214,000.39 : x
  2. Step 2: Convert to fraction form
    310,545.50/428,878.08 = 214,000.39/x
  3. Step 3: Cross multiply
    310,545.50x = 428,878.08 × 214,000.39
  4. Step 4: Simplify right side
    310,545.50x = 91,780,076,382.45
  5. Step 5: Solve for x
    x = 91,780,076,382.45/310,545.50
  6. Step 6: Final answer
    x = 295,544.70

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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.