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Finding the Fourth Proportional to 418,442.16, 577,920.60 and 324,090.48

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Solution

The fourth proportional to 418,442.16, 577,920.60 and 324,090.48 is: 447,609.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,442.16 : 577,920.60 = 324,090.48 : x
  2. Step 2: Convert to fraction form
    418,442.16/577,920.60 = 324,090.48/x
  3. Step 3: Cross multiply
    418,442.16x = 577,920.60 × 324,090.48
  4. Step 4: Simplify right side
    418,442.16x = 187,298,564,655.89
  5. Step 5: Solve for x
    x = 187,298,564,655.89/418,442.16
  6. Step 6: Final answer
    x = 447,609.21

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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.