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Finding the Fourth Proportional to 493,438.80, 739,985.40 and 256,702.80

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Solution

The fourth proportional to 493,438.80, 739,985.40 and 256,702.80 is: 384,964.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,438.80 : 739,985.40 = 256,702.80 : x
  2. Step 2: Convert to fraction form
    493,438.80/739,985.40 = 256,702.80/x
  3. Step 3: Cross multiply
    493,438.80x = 739,985.40 × 256,702.80
  4. Step 4: Simplify right side
    493,438.80x = 189,956,324,139.12
  5. Step 5: Solve for x
    x = 189,956,324,139.12/493,438.80
  6. Step 6: Final answer
    x = 384,964.30

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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.