Home / 1,385,681.76-1,912,114.08-812,616.48

Finding the Fourth Proportional to 1,385,681.76, 1,912,114.08 and 812,616.48

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Solution

The fourth proportional to 1,385,681.76, 1,912,114.08 and 812,616.48 is: 1,121,336.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,681.76 : 1,912,114.08 = 812,616.48 : x
  2. Step 2: Convert to fraction form
    1,385,681.76/1,912,114.08 = 812,616.48/x
  3. Step 3: Cross multiply
    1,385,681.76x = 1,912,114.08 × 812,616.48
  4. Step 4: Simplify right side
    1,385,681.76x = 1,553,815,413,048.04
  5. Step 5: Solve for x
    x = 1,553,815,413,048.04/1,385,681.76
  6. Step 6: Final answer
    x = 1,121,336.41

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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.