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Finding the Fourth Proportional to 1,307,713.70, 1,961,570.55 and 988,849.10

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Solution

The fourth proportional to 1,307,713.70, 1,961,570.55 and 988,849.10 is: 1,483,273.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307,713.70 : 1,961,570.55 = 988,849.10 : x
  2. Step 2: Convert to fraction form
    1,307,713.70/1,961,570.55 = 988,849.10/x
  3. Step 3: Cross multiply
    1,307,713.70x = 1,961,570.55 × 988,849.10
  4. Step 4: Simplify right side
    1,307,713.70x = 1,939,697,272,954.01
  5. Step 5: Solve for x
    x = 1,939,697,272,954.01/1,307,713.70
  6. Step 6: Final answer
    x = 1,483,273.65

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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.