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Finding the Fourth Proportional to 666,780.36, 920,157.48 and 380,293.08

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Solution

The fourth proportional to 666,780.36, 920,157.48 and 380,293.08 is: 524,804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,780.36 : 920,157.48 = 380,293.08 : x
  2. Step 2: Convert to fraction form
    666,780.36/920,157.48 = 380,293.08/x
  3. Step 3: Cross multiply
    666,780.36x = 920,157.48 × 380,293.08
  4. Step 4: Simplify right side
    666,780.36x = 349,929,522,154.24
  5. Step 5: Solve for x
    x = 349,929,522,154.24/666,780.36
  6. Step 6: Final answer
    x = 524,804.78

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1.5x scale

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.