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Finding the Fourth Proportional to 487,036.80, 671,675.58 and 305,765.64

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Solution

The fourth proportional to 487,036.80, 671,675.58 and 305,765.64 is: 421,683.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,036.80 : 671,675.58 = 305,765.64 : x
  2. Step 2: Convert to fraction form
    487,036.80/671,675.58 = 305,765.64/x
  3. Step 3: Cross multiply
    487,036.80x = 671,675.58 × 305,765.64
  4. Step 4: Simplify right side
    487,036.80x = 205,375,313,591.07
  5. Step 5: Solve for x
    x = 205,375,313,591.07/487,036.80
  6. Step 6: Final answer
    x = 421,683.36

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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.