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Finding the Fourth Proportional to 2,938,805.40, 4,407,948.90 and 808,699.80

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Solution

The fourth proportional to 2,938,805.40, 4,407,948.90 and 808,699.80 is: 1,212,978.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938,805.40 : 4,407,948.90 = 808,699.80 : x
  2. Step 2: Convert to fraction form
    2,938,805.40/4,407,948.90 = 808,699.80/x
  3. Step 3: Cross multiply
    2,938,805.40x = 4,407,948.90 × 808,699.80
  4. Step 4: Simplify right side
    2,938,805.40x = 3,564,707,393,840.22
  5. Step 5: Solve for x
    x = 3,564,707,393,840.22/2,938,805.40
  6. Step 6: Final answer
    x = 1,212,978.37

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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.