Home / 1,385,855.23-1,912,426.40-869,886.35

Finding the Fourth Proportional to 1,385,855.23, 1,912,426.40 and 869,886.35

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Solution

The fourth proportional to 1,385,855.23, 1,912,426.40 and 869,886.35 is: 1,200,409.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,855.23 : 1,912,426.40 = 869,886.35 : x
  2. Step 2: Convert to fraction form
    1,385,855.23/1,912,426.40 = 869,886.35/x
  3. Step 3: Cross multiply
    1,385,855.23x = 1,912,426.40 × 869,886.35
  4. Step 4: Simplify right side
    1,385,855.23x = 1,663,593,627,695.42
  5. Step 5: Solve for x
    x = 1,663,593,627,695.42/1,385,855.23
  6. Step 6: Final answer
    x = 1,200,409.39

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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.