Home / 638,215.68-880,739.28-347,829.60

Finding the Fourth Proportional to 638,215.68, 880,739.28 and 347,829.60

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Solution

The fourth proportional to 638,215.68, 880,739.28 and 347,829.60 is: 480,005.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,215.68 : 880,739.28 = 347,829.60 : x
  2. Step 2: Convert to fraction form
    638,215.68/880,739.28 = 347,829.60/x
  3. Step 3: Cross multiply
    638,215.68x = 880,739.28 × 347,829.60
  4. Step 4: Simplify right side
    638,215.68x = 306,347,191,466.69
  5. Step 5: Solve for x
    x = 306,347,191,466.69/638,215.68
  6. Step 6: Final answer
    x = 480,005.74

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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.