Home / 646,554.71-892,178.39-398,157.18

Finding the Fourth Proportional to 646,554.71, 892,178.39 and 398,157.18

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Solution

The fourth proportional to 646,554.71, 892,178.39 and 398,157.18 is: 549,415.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,554.71 : 892,178.39 = 398,157.18 : x
  2. Step 2: Convert to fraction form
    646,554.71/892,178.39 = 398,157.18/x
  3. Step 3: Cross multiply
    646,554.71x = 892,178.39 × 398,157.18
  4. Step 4: Simplify right side
    646,554.71x = 355,227,229,828.55
  5. Step 5: Solve for x
    x = 355,227,229,828.55/646,554.71
  6. Step 6: Final answer
    x = 549,415.58

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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.