Home / 743,540-1,026,081.58-421,249.40

Finding the Fourth Proportional to 743,540, 1,026,081.58 and 421,249.40

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Solution

The fourth proportional to 743,540, 1,026,081.58 and 421,249.40 is: 581,322.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,540 : 1,026,081.58 = 421,249.40 : x
  2. Step 2: Convert to fraction form
    743,540/1,026,081.58 = 421,249.40/x
  3. Step 3: Cross multiply
    743,540x = 1,026,081.58 × 421,249.40
  4. Step 4: Simplify right side
    743,540x = 432,236,249,926.05
  5. Step 5: Solve for x
    x = 432,236,249,926.05/743,540
  6. Step 6: Final answer
    x = 581,322.12

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1.5x scale

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.