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Finding the Fourth Proportional to 389,630.40, 584,464.80 and 203,006.40

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Solution

The fourth proportional to 389,630.40, 584,464.80 and 203,006.40 is: 304,519.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,630.40 : 584,464.80 = 203,006.40 : x
  2. Step 2: Convert to fraction form
    389,630.40/584,464.80 = 203,006.40/x
  3. Step 3: Cross multiply
    389,630.40x = 584,464.80 × 203,006.40
  4. Step 4: Simplify right side
    389,630.40x = 118,650,094,974.72
  5. Step 5: Solve for x
    x = 118,650,094,974.72/389,630.40
  6. Step 6: Final answer
    x = 304,519.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.