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Finding the Fourth Proportional to 642,000.62, 963,146.85 and 342,323.18

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Solution

The fourth proportional to 642,000.62, 963,146.85 and 342,323.18 is: 513,562.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,000.62 : 963,146.85 = 342,323.18 : x
  2. Step 2: Convert to fraction form
    642,000.62/963,146.85 = 342,323.18/x
  3. Step 3: Cross multiply
    642,000.62x = 963,146.85 × 342,323.18
  4. Step 4: Simplify right side
    642,000.62x = 329,707,492,498.98
  5. Step 5: Solve for x
    x = 329,707,492,498.98/642,000.62
  6. Step 6: Final answer
    x = 513,562.58

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Double scale
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Similar ratio
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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.