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Finding the Fourth Proportional to 631,990.32, 872,149.73 and 345,510.42

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Solution

The fourth proportional to 631,990.32, 872,149.73 and 345,510.42 is: 476,806.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,990.32 : 872,149.73 = 345,510.42 : x
  2. Step 2: Convert to fraction form
    631,990.32/872,149.73 = 345,510.42/x
  3. Step 3: Cross multiply
    631,990.32x = 872,149.73 × 345,510.42
  4. Step 4: Simplify right side
    631,990.32x = 301,336,819,515.19
  5. Step 5: Solve for x
    x = 301,336,819,515.19/631,990.32
  6. Step 6: Final answer
    x = 476,806.07

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1.5x scale

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.