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Finding the Fourth Proportional to 1,988,848.40, 2,984,309.40 and 867,030.80

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Solution

The fourth proportional to 1,988,848.40, 2,984,309.40 and 867,030.80 is: 1,300,998.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,848.40 : 2,984,309.40 = 867,030.80 : x
  2. Step 2: Convert to fraction form
    1,988,848.40/2,984,309.40 = 867,030.80/x
  3. Step 3: Cross multiply
    1,988,848.40x = 2,984,309.40 × 867,030.80
  4. Step 4: Simplify right side
    1,988,848.40x = 2,587,488,166,529.52
  5. Step 5: Solve for x
    x = 2,587,488,166,529.52/1,988,848.40
  6. Step 6: Final answer
    x = 1,300,998.19

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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.