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Finding the Fourth Proportional to 539,412.82, 744,364.47 and 309,808.60

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Solution

The fourth proportional to 539,412.82, 744,364.47 and 309,808.60 is: 427,521.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,412.82 : 744,364.47 = 309,808.60 : x
  2. Step 2: Convert to fraction form
    539,412.82/744,364.47 = 309,808.60/x
  3. Step 3: Cross multiply
    539,412.82x = 744,364.47 × 309,808.60
  4. Step 4: Simplify right side
    539,412.82x = 230,610,514,340.44
  5. Step 5: Solve for x
    x = 230,610,514,340.44/539,412.82
  6. Step 6: Final answer
    x = 427,521.38

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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.