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Finding the Fourth Proportional to 665,904.95, 918,995.72 and 375,542.49

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Solution

The fourth proportional to 665,904.95, 918,995.72 and 375,542.49 is: 518,275.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,904.95 : 918,995.72 = 375,542.49 : x
  2. Step 2: Convert to fraction form
    665,904.95/918,995.72 = 375,542.49/x
  3. Step 3: Cross multiply
    665,904.95x = 918,995.72 × 375,542.49
  4. Step 4: Simplify right side
    665,904.95x = 345,121,939,110.43
  5. Step 5: Solve for x
    x = 345,121,939,110.43/665,904.95
  6. Step 6: Final answer
    x = 518,275.08

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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.