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Finding the Fourth Proportional to 487,678.57, 672,980.78 and 272,814.01

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Solution

The fourth proportional to 487,678.57, 672,980.78 and 272,814.01 is: 376,474.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,678.57 : 672,980.78 = 272,814.01 : x
  2. Step 2: Convert to fraction form
    487,678.57/672,980.78 = 272,814.01/x
  3. Step 3: Cross multiply
    487,678.57x = 672,980.78 × 272,814.01
  4. Step 4: Simplify right side
    487,678.57x = 183,598,584,244.31
  5. Step 5: Solve for x
    x = 183,598,584,244.31/487,678.57
  6. Step 6: Final answer
    x = 376,474.58

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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.