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Finding the Fourth Proportional to 310,490.08, 428,225.70 and 208,484.80

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Solution

The fourth proportional to 310,490.08, 428,225.70 and 208,484.80 is: 287,540.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,490.08 : 428,225.70 = 208,484.80 : x
  2. Step 2: Convert to fraction form
    310,490.08/428,225.70 = 208,484.80/x
  3. Step 3: Cross multiply
    310,490.08x = 428,225.70 × 208,484.80
  4. Step 4: Simplify right side
    310,490.08x = 89,278,549,419.36
  5. Step 5: Solve for x
    x = 89,278,549,419.36/310,490.08
  6. Step 6: Final answer
    x = 287,540.75

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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.