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Finding the Fourth Proportional to 402,485.10, 603,727.65 and 396,580.20

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Solution

The fourth proportional to 402,485.10, 603,727.65 and 396,580.20 is: 594,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,485.10 : 603,727.65 = 396,580.20 : x
  2. Step 2: Convert to fraction form
    402,485.10/603,727.65 = 396,580.20/x
  3. Step 3: Cross multiply
    402,485.10x = 603,727.65 × 396,580.20
  4. Step 4: Simplify right side
    402,485.10x = 239,426,432,182.53
  5. Step 5: Solve for x
    x = 239,426,432,182.53/402,485.10
  6. Step 6: Final answer
    x = 594,870.30

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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.