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Finding the Fourth Proportional to 1,238,784.60, 1,855,844.10 and 637,699.80

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Solution

The fourth proportional to 1,238,784.60, 1,855,844.10 and 637,699.80 is: 955,348.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,784.60 : 1,855,844.10 = 637,699.80 : x
  2. Step 2: Convert to fraction form
    1,238,784.60/1,855,844.10 = 637,699.80/x
  3. Step 3: Cross multiply
    1,238,784.60x = 1,855,844.10 × 637,699.80
  4. Step 4: Simplify right side
    1,238,784.60x = 1,183,471,411,401.18
  5. Step 5: Solve for x
    x = 1,183,471,411,401.18/1,238,784.60
  6. Step 6: Final answer
    x = 955,348.82

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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.