Home / 420,774.07-631,474.59-308,743.78

Finding the Fourth Proportional to 420,774.07, 631,474.59 and 308,743.78

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Solution

The fourth proportional to 420,774.07, 631,474.59 and 308,743.78 is: 463,345.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,774.07 : 631,474.59 = 308,743.78 : x
  2. Step 2: Convert to fraction form
    420,774.07/631,474.59 = 308,743.78/x
  3. Step 3: Cross multiply
    420,774.07x = 631,474.59 × 308,743.78
  4. Step 4: Simplify right side
    420,774.07x = 194,963,851,890.55
  5. Step 5: Solve for x
    x = 194,963,851,890.55/420,774.07
  6. Step 6: Final answer
    x = 463,345.69

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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.