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Finding the Fourth Proportional to 390,830.01, 538,917.12 and 254,611.35

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Solution

The fourth proportional to 390,830.01, 538,917.12 and 254,611.35 is: 351,084.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,830.01 : 538,917.12 = 254,611.35 : x
  2. Step 2: Convert to fraction form
    390,830.01/538,917.12 = 254,611.35/x
  3. Step 3: Cross multiply
    390,830.01x = 538,917.12 × 254,611.35
  4. Step 4: Simplify right side
    390,830.01x = 137,214,415,461.31
  5. Step 5: Solve for x
    x = 137,214,415,461.31/390,830.01
  6. Step 6: Final answer
    x = 351,084.65

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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.