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Finding the Fourth Proportional to 342,362.67, 513,443.62 and 128,976.63

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Solution

The fourth proportional to 342,362.67, 513,443.62 and 128,976.63 is: 193,427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,362.67 : 513,443.62 = 128,976.63 : x
  2. Step 2: Convert to fraction form
    342,362.67/513,443.62 = 128,976.63/x
  3. Step 3: Cross multiply
    342,362.67x = 513,443.62 × 128,976.63
  4. Step 4: Simplify right side
    342,362.67x = 66,222,227,802.60
  5. Step 5: Solve for x
    x = 66,222,227,802.60/342,362.67
  6. Step 6: Final answer
    x = 193,427.13

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1.5x scale

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.