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Finding the Fourth Proportional to 487,125.82, 672,182.31 and 283,139.74

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Solution

The fourth proportional to 487,125.82, 672,182.31 and 283,139.74 is: 390,703.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,125.82 : 672,182.31 = 283,139.74 : x
  2. Step 2: Convert to fraction form
    487,125.82/672,182.31 = 283,139.74/x
  3. Step 3: Cross multiply
    487,125.82x = 672,182.31 × 283,139.74
  4. Step 4: Simplify right side
    487,125.82x = 190,321,524,486.00
  5. Step 5: Solve for x
    x = 190,321,524,486.00/487,125.82
  6. Step 6: Final answer
    x = 390,703.01

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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.