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Finding the Fourth Proportional to 1,212,851.70, 1,819,277.55 and 834,938.10

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Solution

The fourth proportional to 1,212,851.70, 1,819,277.55 and 834,938.10 is: 1,252,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,851.70 : 1,819,277.55 = 834,938.10 : x
  2. Step 2: Convert to fraction form
    1,212,851.70/1,819,277.55 = 834,938.10/x
  3. Step 3: Cross multiply
    1,212,851.70x = 1,819,277.55 × 834,938.10
  4. Step 4: Simplify right side
    1,212,851.70x = 1,518,984,140,969.66
  5. Step 5: Solve for x
    x = 1,518,984,140,969.66/1,212,851.70
  6. Step 6: Final answer
    x = 1,252,407.15

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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.