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Finding the Fourth Proportional to 271,090.80, 406,636.20 and 258,260.40

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Solution

The fourth proportional to 271,090.80, 406,636.20 and 258,260.40 is: 387,390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,090.80 : 406,636.20 = 258,260.40 : x
  2. Step 2: Convert to fraction form
    271,090.80/406,636.20 = 258,260.40/x
  3. Step 3: Cross multiply
    271,090.80x = 406,636.20 × 258,260.40
  4. Step 4: Simplify right side
    271,090.80x = 105,018,027,666.48
  5. Step 5: Solve for x
    x = 105,018,027,666.48/271,090.80
  6. Step 6: Final answer
    x = 387,390.60

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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.