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Finding the Fourth Proportional to 724,671.40, 1,085,694.90 and 619,695.40

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Solution

The fourth proportional to 724,671.40, 1,085,694.90 and 619,695.40 is: 928,420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,671.40 : 1,085,694.90 = 619,695.40 : x
  2. Step 2: Convert to fraction form
    724,671.40/1,085,694.90 = 619,695.40/x
  3. Step 3: Cross multiply
    724,671.40x = 1,085,694.90 × 619,695.40
  4. Step 4: Simplify right side
    724,671.40x = 672,800,135,333.46
  5. Step 5: Solve for x
    x = 672,800,135,333.46/724,671.40
  6. Step 6: Final answer
    x = 928,420.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.