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Finding the Fourth Proportional to 642,520.20, 962,858.70 and 472,715.40

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Solution

The fourth proportional to 642,520.20, 962,858.70 and 472,715.40 is: 708,395.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,520.20 : 962,858.70 = 472,715.40 : x
  2. Step 2: Convert to fraction form
    642,520.20/962,858.70 = 472,715.40/x
  3. Step 3: Cross multiply
    642,520.20x = 962,858.70 × 472,715.40
  4. Step 4: Simplify right side
    642,520.20x = 455,158,135,513.98
  5. Step 5: Solve for x
    x = 455,158,135,513.98/642,520.20
  6. Step 6: Final answer
    x = 708,395.06

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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.