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Finding the Fourth Proportional to 656,987.50, 906,642.76 and 355,181.50

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Solution

The fourth proportional to 656,987.50, 906,642.76 and 355,181.50 is: 490,150.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,987.50 : 906,642.76 = 355,181.50 : x
  2. Step 2: Convert to fraction form
    656,987.50/906,642.76 = 355,181.50/x
  3. Step 3: Cross multiply
    656,987.50x = 906,642.76 × 355,181.50
  4. Step 4: Simplify right side
    656,987.50x = 322,022,735,460.94
  5. Step 5: Solve for x
    x = 322,022,735,460.94/656,987.50
  6. Step 6: Final answer
    x = 490,150.48

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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.