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Finding the Fourth Proportional to 690,219.34, 950,390.21 and 688,226.44

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Solution

The fourth proportional to 690,219.34, 950,390.21 and 688,226.44 is: 947,646.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,219.34 : 950,390.21 = 688,226.44 : x
  2. Step 2: Convert to fraction form
    690,219.34/950,390.21 = 688,226.44/x
  3. Step 3: Cross multiply
    690,219.34x = 950,390.21 × 688,226.44
  4. Step 4: Simplify right side
    690,219.34x = 654,083,667,398.02
  5. Step 5: Solve for x
    x = 654,083,667,398.02/690,219.34
  6. Step 6: Final answer
    x = 947,646.10

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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.