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Finding the Fourth Proportional to 389,801.55, 538,442.39 and 313,607.68

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Solution

The fourth proportional to 389,801.55, 538,442.39 and 313,607.68 is: 433,193.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,801.55 : 538,442.39 = 313,607.68 : x
  2. Step 2: Convert to fraction form
    389,801.55/538,442.39 = 313,607.68/x
  3. Step 3: Cross multiply
    389,801.55x = 538,442.39 × 313,607.68
  4. Step 4: Simplify right side
    389,801.55x = 168,859,668,741.56
  5. Step 5: Solve for x
    x = 168,859,668,741.56/389,801.55
  6. Step 6: Final answer
    x = 433,193.94

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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.