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Finding the Fourth Proportional to 493,931.30, 740,840.35 and 129,228.12

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Solution

The fourth proportional to 493,931.30, 740,840.35 and 129,228.12 is: 193,827.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,931.30 : 740,840.35 = 129,228.12 : x
  2. Step 2: Convert to fraction form
    493,931.30/740,840.35 = 129,228.12/x
  3. Step 3: Cross multiply
    493,931.30x = 740,840.35 × 129,228.12
  4. Step 4: Simplify right side
    493,931.30x = 95,737,401,946.44
  5. Step 5: Solve for x
    x = 95,737,401,946.44/493,931.30
  6. Step 6: Final answer
    x = 193,827.36

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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.