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Finding the Fourth Proportional to 666,902.08, 920,412.48 and 380,356.48

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Solution

The fourth proportional to 666,902.08, 920,412.48 and 380,356.48 is: 524,941.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,902.08 : 920,412.48 = 380,356.48 : x
  2. Step 2: Convert to fraction form
    666,902.08/920,412.48 = 380,356.48/x
  3. Step 3: Cross multiply
    666,902.08x = 920,412.48 × 380,356.48
  4. Step 4: Simplify right side
    666,902.08x = 350,084,851,040.87
  5. Step 5: Solve for x
    x = 350,084,851,040.87/666,902.08
  6. Step 6: Final answer
    x = 524,941.91

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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.