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Finding the Fourth Proportional to 487,124.82, 672,180.93 and 283,138.74

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Solution

The fourth proportional to 487,124.82, 672,180.93 and 283,138.74 is: 390,701.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,124.82 : 672,180.93 = 283,138.74 : x
  2. Step 2: Convert to fraction form
    487,124.82/672,180.93 = 283,138.74/x
  3. Step 3: Cross multiply
    487,124.82x = 672,180.93 × 283,138.74
  4. Step 4: Simplify right side
    487,124.82x = 190,320,461,572.23
  5. Step 5: Solve for x
    x = 190,320,461,572.23/487,124.82
  6. Step 6: Final answer
    x = 390,701.63

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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.