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Finding the Fourth Proportional to 828,001.80, 1,242,002.70 and 820,128.60

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Solution

The fourth proportional to 828,001.80, 1,242,002.70 and 820,128.60 is: 1,230,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,001.80 : 1,242,002.70 = 820,128.60 : x
  2. Step 2: Convert to fraction form
    828,001.80/1,242,002.70 = 820,128.60/x
  3. Step 3: Cross multiply
    828,001.80x = 1,242,002.70 × 820,128.60
  4. Step 4: Simplify right side
    828,001.80x = 1,018,601,935,547.22
  5. Step 5: Solve for x
    x = 1,018,601,935,547.22/828,001.80
  6. Step 6: Final answer
    x = 1,230,192.90

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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.