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Finding the Fourth Proportional to 390,255.08, 538,552.14 and 211,407.08

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Solution

The fourth proportional to 390,255.08, 538,552.14 and 211,407.08 is: 291,741.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,255.08 : 538,552.14 = 211,407.08 : x
  2. Step 2: Convert to fraction form
    390,255.08/538,552.14 = 211,407.08/x
  3. Step 3: Cross multiply
    390,255.08x = 538,552.14 × 211,407.08
  4. Step 4: Simplify right side
    390,255.08x = 113,853,735,345.15
  5. Step 5: Solve for x
    x = 113,853,735,345.15/390,255.08
  6. Step 6: Final answer
    x = 291,741.84

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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.