Home / 678,328.90-1,017,493.35-205,087.30

Finding the Fourth Proportional to 678,328.90, 1,017,493.35 and 205,087.30

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Solution

The fourth proportional to 678,328.90, 1,017,493.35 and 205,087.30 is: 307,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,328.90 : 1,017,493.35 = 205,087.30 : x
  2. Step 2: Convert to fraction form
    678,328.90/1,017,493.35 = 205,087.30/x
  3. Step 3: Cross multiply
    678,328.90x = 1,017,493.35 × 205,087.30
  4. Step 4: Simplify right side
    678,328.90x = 208,674,963,919.46
  5. Step 5: Solve for x
    x = 208,674,963,919.46/678,328.90
  6. Step 6: Final answer
    x = 307,630.95

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Double scale
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Similar ratio
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1.5x scale

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.