Home / 645,089.64-890,246.55-354,723.30

Finding the Fourth Proportional to 645,089.64, 890,246.55 and 354,723.30

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Solution

The fourth proportional to 645,089.64, 890,246.55 and 354,723.30 is: 489,530.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,089.64 : 890,246.55 = 354,723.30 : x
  2. Step 2: Convert to fraction form
    645,089.64/890,246.55 = 354,723.30/x
  3. Step 3: Cross multiply
    645,089.64x = 890,246.55 × 354,723.30
  4. Step 4: Simplify right side
    645,089.64x = 315,791,194,029.62
  5. Step 5: Solve for x
    x = 315,791,194,029.62/645,089.64
  6. Step 6: Final answer
    x = 489,530.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.