Home / 1,222,881.50-1,687,576.47-686,337.50

Finding the Fourth Proportional to 1,222,881.50, 1,687,576.47 and 686,337.50

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Solution

The fourth proportional to 1,222,881.50, 1,687,576.47 and 686,337.50 is: 947,145.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,881.50 : 1,687,576.47 = 686,337.50 : x
  2. Step 2: Convert to fraction form
    1,222,881.50/1,687,576.47 = 686,337.50/x
  3. Step 3: Cross multiply
    1,222,881.50x = 1,687,576.47 × 686,337.50
  4. Step 4: Simplify right side
    1,222,881.50x = 1,158,247,015,478.63
  5. Step 5: Solve for x
    x = 1,158,247,015,478.63/1,222,881.50
  6. Step 6: Final answer
    x = 947,145.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.