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Finding the Fourth Proportional to 642,405.10, 963,607.65 and 617,910.70

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Solution

The fourth proportional to 642,405.10, 963,607.65 and 617,910.70 is: 926,866.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,405.10 : 963,607.65 = 617,910.70 : x
  2. Step 2: Convert to fraction form
    642,405.10/963,607.65 = 617,910.70/x
  3. Step 3: Cross multiply
    642,405.10x = 963,607.65 × 617,910.70
  4. Step 4: Simplify right side
    642,405.10x = 595,423,477,536.86
  5. Step 5: Solve for x
    x = 595,423,477,536.86/642,405.10
  6. Step 6: Final answer
    x = 926,866.05

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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.