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Finding the Fourth Proportional to 319,913.40, 480,035.70 and 130,512.60

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Solution

The fourth proportional to 319,913.40, 480,035.70 and 130,512.60 is: 195,836.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,913.40 : 480,035.70 = 130,512.60 : x
  2. Step 2: Convert to fraction form
    319,913.40/480,035.70 = 130,512.60/x
  3. Step 3: Cross multiply
    319,913.40x = 480,035.70 × 130,512.60
  4. Step 4: Simplify right side
    319,913.40x = 62,650,707,299.82
  5. Step 5: Solve for x
    x = 62,650,707,299.82/319,913.40
  6. Step 6: Final answer
    x = 195,836.46

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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.