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Finding the Fourth Proportional to 666,718.82, 920,071.96 and 360,795.20

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Solution

The fourth proportional to 666,718.82, 920,071.96 and 360,795.20 is: 497,897.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,718.82 : 920,071.96 = 360,795.20 : x
  2. Step 2: Convert to fraction form
    666,718.82/920,071.96 = 360,795.20/x
  3. Step 3: Cross multiply
    666,718.82x = 920,071.96 × 360,795.20
  4. Step 4: Simplify right side
    666,718.82x = 331,957,544,956.59
  5. Step 5: Solve for x
    x = 331,957,544,956.59/666,718.82
  6. Step 6: Final answer
    x = 497,897.37

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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.