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Finding the Fourth Proportional to 521,009.68, 781,506.28 and 166,018.60

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Solution

The fourth proportional to 521,009.68, 781,506.28 and 166,018.60 is: 249,025.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,009.68 : 781,506.28 = 166,018.60 : x
  2. Step 2: Convert to fraction form
    521,009.68/781,506.28 = 166,018.60/x
  3. Step 3: Cross multiply
    521,009.68x = 781,506.28 × 166,018.60
  4. Step 4: Simplify right side
    521,009.68x = 129,744,578,496.81
  5. Step 5: Solve for x
    x = 129,744,578,496.81/521,009.68
  6. Step 6: Final answer
    x = 249,025.27

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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.