Home / 515,457.24-711,355.44-321,979.56

Finding the Fourth Proportional to 515,457.24, 711,355.44 and 321,979.56

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Solution

The fourth proportional to 515,457.24, 711,355.44 and 321,979.56 is: 444,347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,457.24 : 711,355.44 = 321,979.56 : x
  2. Step 2: Convert to fraction form
    515,457.24/711,355.44 = 321,979.56/x
  3. Step 3: Cross multiply
    515,457.24x = 711,355.44 × 321,979.56
  4. Step 4: Simplify right side
    515,457.24x = 229,041,911,574.81
  5. Step 5: Solve for x
    x = 229,041,911,574.81/515,457.24
  6. Step 6: Final answer
    x = 444,347.06

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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.