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Finding the Fourth Proportional to 519,489.40, 779,258.40 and 164,531.20

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Solution

The fourth proportional to 519,489.40, 779,258.40 and 164,531.20 is: 246,804.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,489.40 : 779,258.40 = 164,531.20 : x
  2. Step 2: Convert to fraction form
    519,489.40/779,258.40 = 164,531.20/x
  3. Step 3: Cross multiply
    519,489.40x = 779,258.40 × 164,531.20
  4. Step 4: Simplify right side
    519,489.40x = 128,212,319,662.08
  5. Step 5: Solve for x
    x = 128,212,319,662.08/519,489.40
  6. Step 6: Final answer
    x = 246,804.50

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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.