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Finding the Fourth Proportional to 487,612.96, 673,321.20 and 306,627.76

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Solution

The fourth proportional to 487,612.96, 673,321.20 and 306,627.76 is: 423,407.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,612.96 : 673,321.20 = 306,627.76 : x
  2. Step 2: Convert to fraction form
    487,612.96/673,321.20 = 306,627.76/x
  3. Step 3: Cross multiply
    487,612.96x = 673,321.20 × 306,627.76
  4. Step 4: Simplify right side
    487,612.96x = 206,458,971,316.51
  5. Step 5: Solve for x
    x = 206,458,971,316.51/487,612.96
  6. Step 6: Final answer
    x = 423,407.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.