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Finding the Fourth Proportional to 637,288.40, 955,702.20 and 321,640.40

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Solution

The fourth proportional to 637,288.40, 955,702.20 and 321,640.40 is: 482,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,288.40 : 955,702.20 = 321,640.40 : x
  2. Step 2: Convert to fraction form
    637,288.40/955,702.20 = 321,640.40/x
  3. Step 3: Cross multiply
    637,288.40x = 955,702.20 × 321,640.40
  4. Step 4: Simplify right side
    637,288.40x = 307,392,437,888.88
  5. Step 5: Solve for x
    x = 307,392,437,888.88/637,288.40
  6. Step 6: Final answer
    x = 482,344.32

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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.