Home / 828,001.70-1,242,002.55-509,137.10

Finding the Fourth Proportional to 828,001.70, 1,242,002.55 and 509,137.10

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Solution

The fourth proportional to 828,001.70, 1,242,002.55 and 509,137.10 is: 763,705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,001.70 : 1,242,002.55 = 509,137.10 : x
  2. Step 2: Convert to fraction form
    828,001.70/1,242,002.55 = 509,137.10/x
  3. Step 3: Cross multiply
    828,001.70x = 1,242,002.55 × 509,137.10
  4. Step 4: Simplify right side
    828,001.70x = 632,349,576,499.61
  5. Step 5: Solve for x
    x = 632,349,576,499.61/828,001.70
  6. Step 6: Final answer
    x = 763,705.65

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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.