Home / 487,921.60-731,882.40-172,410.40

Finding the Fourth Proportional to 487,921.60, 731,882.40 and 172,410.40

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Solution

The fourth proportional to 487,921.60, 731,882.40 and 172,410.40 is: 258,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,921.60 : 731,882.40 = 172,410.40 : x
  2. Step 2: Convert to fraction form
    487,921.60/731,882.40 = 172,410.40/x
  3. Step 3: Cross multiply
    487,921.60x = 731,882.40 × 172,410.40
  4. Step 4: Simplify right side
    487,921.60x = 126,184,137,336.96
  5. Step 5: Solve for x
    x = 126,184,137,336.96/487,921.60
  6. Step 6: Final answer
    x = 258,615.60

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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.