Home / 678,271.40-1,017,867.90-378,751.40

Finding the Fourth Proportional to 678,271.40, 1,017,867.90 and 378,751.40

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Solution

The fourth proportional to 678,271.40, 1,017,867.90 and 378,751.40 is: 568,384.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,271.40 : 1,017,867.90 = 378,751.40 : x
  2. Step 2: Convert to fraction form
    678,271.40/1,017,867.90 = 378,751.40/x
  3. Step 3: Cross multiply
    678,271.40x = 1,017,867.90 × 378,751.40
  4. Step 4: Simplify right side
    678,271.40x = 385,518,892,140.06
  5. Step 5: Solve for x
    x = 385,518,892,140.06/678,271.40
  6. Step 6: Final answer
    x = 568,384.41

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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.