Home / 715,445.48-987,099.46-428,861.00

Finding the Fourth Proportional to 715,445.48, 987,099.46 and 428,861.00

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Solution

The fourth proportional to 715,445.48, 987,099.46 and 428,861.00 is: 591,699.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,445.48 : 987,099.46 = 428,861.00 : x
  2. Step 2: Convert to fraction form
    715,445.48/987,099.46 = 428,861.00/x
  3. Step 3: Cross multiply
    715,445.48x = 987,099.46 × 428,861.00
  4. Step 4: Simplify right side
    715,445.48x = 423,328,455,507.41
  5. Step 5: Solve for x
    x = 423,328,455,507.41/715,445.48
  6. Step 6: Final answer
    x = 591,699.12

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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.