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Finding the Fourth Proportional to 768,400.90, 1,077,335.90 and 768,400.90

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Solution

The fourth proportional to 768,400.90, 1,077,335.90 and 768,400.90 is: 1,077,335.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,400.90 : 1,077,335.90 = 768,400.90 : x
  2. Step 2: Convert to fraction form
    768,400.90/1,077,335.90 = 768,400.90/x
  3. Step 3: Cross multiply
    768,400.90x = 1,077,335.90 × 768,400.90
  4. Step 4: Simplify right side
    768,400.90x = 827,825,875,162.31
  5. Step 5: Solve for x
    x = 827,825,875,162.31/768,400.90
  6. Step 6: Final answer
    x = 1,077,335.90

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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.