Home / 1,387,841.32-2,078,435.58-712,145.32

Finding the Fourth Proportional to 1,387,841.32, 2,078,435.58 and 712,145.32

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Solution

The fourth proportional to 1,387,841.32, 2,078,435.58 and 712,145.32 is: 1,066,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,841.32 : 2,078,435.58 = 712,145.32 : x
  2. Step 2: Convert to fraction form
    1,387,841.32/2,078,435.58 = 712,145.32/x
  3. Step 3: Cross multiply
    1,387,841.32x = 2,078,435.58 × 712,145.32
  4. Step 4: Simplify right side
    1,387,841.32x = 1,480,148,171,218.49
  5. Step 5: Solve for x
    x = 1,480,148,171,218.49/1,387,841.32
  6. Step 6: Final answer
    x = 1,066,511.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.