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Finding the Fourth Proportional to 603,705.80, 905,558.70 and 540,720.20

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Solution

The fourth proportional to 603,705.80, 905,558.70 and 540,720.20 is: 811,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,705.80 : 905,558.70 = 540,720.20 : x
  2. Step 2: Convert to fraction form
    603,705.80/905,558.70 = 540,720.20/x
  3. Step 3: Cross multiply
    603,705.80x = 905,558.70 × 540,720.20
  4. Step 4: Simplify right side
    603,705.80x = 489,653,881,375.74
  5. Step 5: Solve for x
    x = 489,653,881,375.74/603,705.80
  6. Step 6: Final answer
    x = 811,080.30

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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.