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Finding the Fourth Proportional to 656,878.55, 906,480.30 and 370,398.86

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Solution

The fourth proportional to 656,878.55, 906,480.30 and 370,398.86 is: 511,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,878.55 : 906,480.30 = 370,398.86 : x
  2. Step 2: Convert to fraction form
    656,878.55/906,480.30 = 370,398.86/x
  3. Step 3: Cross multiply
    656,878.55x = 906,480.30 × 370,398.86
  4. Step 4: Simplify right side
    656,878.55x = 335,759,265,200.06
  5. Step 5: Solve for x
    x = 335,759,265,200.06/656,878.55
  6. Step 6: Final answer
    x = 511,143.60

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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.