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Finding the Fourth Proportional to 668,491.21, 922,219.32 and 396,570.57

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Solution

The fourth proportional to 668,491.21, 922,219.32 and 396,570.57 is: 547,090.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,491.21 : 922,219.32 = 396,570.57 : x
  2. Step 2: Convert to fraction form
    668,491.21/922,219.32 = 396,570.57/x
  3. Step 3: Cross multiply
    668,491.21x = 922,219.32 × 396,570.57
  4. Step 4: Simplify right side
    668,491.21x = 365,725,041,397.41
  5. Step 5: Solve for x
    x = 365,725,041,397.41/668,491.21
  6. Step 6: Final answer
    x = 547,090.28

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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.