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Finding the Fourth Proportional to 1,211,683.40, 1,693,039 and 1,211,683.40

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Solution

The fourth proportional to 1,211,683.40, 1,693,039 and 1,211,683.40 is: 1,693,039

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,683.40 : 1,693,039 = 1,211,683.40 : x
  2. Step 2: Convert to fraction form
    1,211,683.40/1,693,039 = 1,211,683.40/x
  3. Step 3: Cross multiply
    1,211,683.40x = 1,693,039 × 1,211,683.40
  4. Step 4: Simplify right side
    1,211,683.40x = 2,051,427,251,852.60
  5. Step 5: Solve for x
    x = 2,051,427,251,852.60/1,211,683.40
  6. Step 6: Final answer
    x = 1,693,039

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.