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Finding the Fourth Proportional to 665,699.88, 918,665.88 and 359,775.36

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Solution

The fourth proportional to 665,699.88, 918,665.88 and 359,775.36 is: 496,490.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,699.88 : 918,665.88 = 359,775.36 : x
  2. Step 2: Convert to fraction form
    665,699.88/918,665.88 = 359,775.36/x
  3. Step 3: Cross multiply
    665,699.88x = 918,665.88 × 359,775.36
  4. Step 4: Simplify right side
    665,699.88x = 330,513,347,696.72
  5. Step 5: Solve for x
    x = 330,513,347,696.72/665,699.88
  6. Step 6: Final answer
    x = 496,490.02

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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.