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Finding the Fourth Proportional to 402,476.20, 603,714.30 and 360,485.80

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Solution

The fourth proportional to 402,476.20, 603,714.30 and 360,485.80 is: 540,728.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,476.20 : 603,714.30 = 360,485.80 : x
  2. Step 2: Convert to fraction form
    402,476.20/603,714.30 = 360,485.80/x
  3. Step 3: Cross multiply
    402,476.20x = 603,714.30 × 360,485.80
  4. Step 4: Simplify right side
    402,476.20x = 217,630,432,406.94
  5. Step 5: Solve for x
    x = 217,630,432,406.94/402,476.20
  6. Step 6: Final answer
    x = 540,728.70

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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.