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Finding the Fourth Proportional to 562,939.38, 776,663.55 and 321,048.06

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Solution

The fourth proportional to 562,939.38, 776,663.55 and 321,048.06 is: 442,936.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,939.38 : 776,663.55 = 321,048.06 : x
  2. Step 2: Convert to fraction form
    562,939.38/776,663.55 = 321,048.06/x
  3. Step 3: Cross multiply
    562,939.38x = 776,663.55 × 321,048.06
  4. Step 4: Simplify right side
    562,939.38x = 249,346,326,000.21
  5. Step 5: Solve for x
    x = 249,346,326,000.21/562,939.38
  6. Step 6: Final answer
    x = 442,936.37

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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.