Home / 1,385,262-1,911,979.80-812,486.70

Finding the Fourth Proportional to 1,385,262, 1,911,979.80 and 812,486.70

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Solution

The fourth proportional to 1,385,262, 1,911,979.80 and 812,486.70 is: 1,121,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,262 : 1,911,979.80 = 812,486.70 : x
  2. Step 2: Convert to fraction form
    1,385,262/1,911,979.80 = 812,486.70/x
  3. Step 3: Cross multiply
    1,385,262x = 1,911,979.80 × 812,486.70
  4. Step 4: Simplify right side
    1,385,262x = 1,553,458,158,168.66
  5. Step 5: Solve for x
    x = 1,553,458,158,168.66/1,385,262
  6. Step 6: Final answer
    x = 1,121,418.30

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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.