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Finding the Fourth Proportional to 528,644.40, 792,959.70 and 129,288.63

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Solution

The fourth proportional to 528,644.40, 792,959.70 and 129,288.63 is: 193,931.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,644.40 : 792,959.70 = 129,288.63 : x
  2. Step 2: Convert to fraction form
    528,644.40/792,959.70 = 129,288.63/x
  3. Step 3: Cross multiply
    528,644.40x = 792,959.70 × 129,288.63
  4. Step 4: Simplify right side
    528,644.40x = 102,520,673,258.21
  5. Step 5: Solve for x
    x = 102,520,673,258.21/528,644.40
  6. Step 6: Final answer
    x = 193,931.26

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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.