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Finding the Fourth Proportional to 402,317.48, 555,058.54 and 257,208.21

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Solution

The fourth proportional to 402,317.48, 555,058.54 and 257,208.21 is: 354,858.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,317.48 : 555,058.54 = 257,208.21 : x
  2. Step 2: Convert to fraction form
    402,317.48/555,058.54 = 257,208.21/x
  3. Step 3: Cross multiply
    402,317.48x = 555,058.54 × 257,208.21
  4. Step 4: Simplify right side
    402,317.48x = 142,765,613,840.12
  5. Step 5: Solve for x
    x = 142,765,613,840.12/402,317.48
  6. Step 6: Final answer
    x = 354,858.09

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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.