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Finding the Fourth Proportional to 487,356.41, 672,281.73 and 283,384.86

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Solution

The fourth proportional to 487,356.41, 672,281.73 and 283,384.86 is: 390,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,356.41 : 672,281.73 = 283,384.86 : x
  2. Step 2: Convert to fraction form
    487,356.41/672,281.73 = 283,384.86/x
  3. Step 3: Cross multiply
    487,356.41x = 672,281.73 × 283,384.86
  4. Step 4: Simplify right side
    487,356.41x = 190,514,463,936.61
  5. Step 5: Solve for x
    x = 190,514,463,936.61/487,356.41
  6. Step 6: Final answer
    x = 390,914.05

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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.