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Finding the Fourth Proportional to 666,353.69, 919,568.09 and 360,430.05

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Solution

The fourth proportional to 666,353.69, 919,568.09 and 360,430.05 is: 497,393.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,353.69 : 919,568.09 = 360,430.05 : x
  2. Step 2: Convert to fraction form
    666,353.69/919,568.09 = 360,430.05/x
  3. Step 3: Cross multiply
    666,353.69x = 919,568.09 × 360,430.05
  4. Step 4: Simplify right side
    666,353.69x = 331,439,974,956.03
  5. Step 5: Solve for x
    x = 331,439,974,956.03/666,353.69
  6. Step 6: Final answer
    x = 497,393.47

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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.