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Finding the Fourth Proportional to 642,518.20, 962,855.70 and 472,713.40

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Solution

The fourth proportional to 642,518.20, 962,855.70 and 472,713.40 is: 708,392.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,518.20 : 962,855.70 = 472,713.40 : x
  2. Step 2: Convert to fraction form
    642,518.20/962,855.70 = 472,713.40/x
  3. Step 3: Cross multiply
    642,518.20x = 962,855.70 × 472,713.40
  4. Step 4: Simplify right side
    642,518.20x = 455,154,791,656.38
  5. Step 5: Solve for x
    x = 455,154,791,656.38/642,518.20
  6. Step 6: Final answer
    x = 708,392.06

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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.