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Finding the Fourth Proportional to 642,001.80, 963,002.70 and 455,377.80

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Solution

The fourth proportional to 642,001.80, 963,002.70 and 455,377.80 is: 683,066.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,001.80 : 963,002.70 = 455,377.80 : x
  2. Step 2: Convert to fraction form
    642,001.80/963,002.70 = 455,377.80/x
  3. Step 3: Cross multiply
    642,001.80x = 963,002.70 × 455,377.80
  4. Step 4: Simplify right side
    642,001.80x = 438,530,050,920.06
  5. Step 5: Solve for x
    x = 438,530,050,920.06/642,001.80
  6. Step 6: Final answer
    x = 683,066.70

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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.