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Finding the Fourth Proportional to 390,148.26, 538,404.60 and 211,300.26

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Solution

The fourth proportional to 390,148.26, 538,404.60 and 211,300.26 is: 291,594.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,148.26 : 538,404.60 = 211,300.26 : x
  2. Step 2: Convert to fraction form
    390,148.26/538,404.60 = 211,300.26/x
  3. Step 3: Cross multiply
    390,148.26x = 538,404.60 × 211,300.26
  4. Step 4: Simplify right side
    390,148.26x = 113,765,031,965.20
  5. Step 5: Solve for x
    x = 113,765,031,965.20/390,148.26
  6. Step 6: Final answer
    x = 291,594.36

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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.