Home / 642,401.17-886,513.49-384,289.00

Finding the Fourth Proportional to 642,401.17, 886,513.49 and 384,289.00

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Solution

The fourth proportional to 642,401.17, 886,513.49 and 384,289.00 is: 530,318.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,401.17 : 886,513.49 = 384,289.00 : x
  2. Step 2: Convert to fraction form
    642,401.17/886,513.49 = 384,289.00/x
  3. Step 3: Cross multiply
    642,401.17x = 886,513.49 × 384,289.00
  4. Step 4: Simplify right side
    642,401.17x = 340,677,378,420.88
  5. Step 5: Solve for x
    x = 340,677,378,420.88/642,401.17
  6. Step 6: Final answer
    x = 530,318.74

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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.