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Finding the Fourth Proportional to 666,636.89, 919,955.93 and 360,718.65

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Solution

The fourth proportional to 666,636.89, 919,955.93 and 360,718.65 is: 497,790.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,636.89 : 919,955.93 = 360,718.65 : x
  2. Step 2: Convert to fraction form
    666,636.89/919,955.93 = 360,718.65/x
  3. Step 3: Cross multiply
    666,636.89x = 919,955.93 × 360,718.65
  4. Step 4: Simplify right side
    666,636.89x = 331,845,259,325.50
  5. Step 5: Solve for x
    x = 331,845,259,325.50/666,636.89
  6. Step 6: Final answer
    x = 497,790.13

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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.