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Finding the Fourth Proportional to 508,721.76, 702,036.40 and 304,891.04

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Solution

The fourth proportional to 508,721.76, 702,036.40 and 304,891.04 is: 420,749.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,721.76 : 702,036.40 = 304,891.04 : x
  2. Step 2: Convert to fraction form
    508,721.76/702,036.40 = 304,891.04/x
  3. Step 3: Cross multiply
    508,721.76x = 702,036.40 × 304,891.04
  4. Step 4: Simplify right side
    508,721.76x = 214,044,608,113.86
  5. Step 5: Solve for x
    x = 214,044,608,113.86/508,721.76
  6. Step 6: Final answer
    x = 420,749.86

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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.