Home / 487,048.20-671,691.33-305,777.04

Finding the Fourth Proportional to 487,048.20, 671,691.33 and 305,777.04

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Solution

The fourth proportional to 487,048.20, 671,691.33 and 305,777.04 is: 421,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,048.20 : 671,691.33 = 305,777.04 : x
  2. Step 2: Convert to fraction form
    487,048.20/671,691.33 = 305,777.04/x
  3. Step 3: Cross multiply
    487,048.20x = 671,691.33 × 305,777.04
  4. Step 4: Simplify right side
    487,048.20x = 205,387,786,681.06
  5. Step 5: Solve for x
    x = 205,387,786,681.06/487,048.20
  6. Step 6: Final answer
    x = 421,699.10

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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.