Home / 678,415.30-1,017,770.55-205,088.30

Finding the Fourth Proportional to 678,415.30, 1,017,770.55 and 205,088.30

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Solution

The fourth proportional to 678,415.30, 1,017,770.55 and 205,088.30 is: 307,677.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,415.30 : 1,017,770.55 = 205,088.30 : x
  2. Step 2: Convert to fraction form
    678,415.30/1,017,770.55 = 205,088.30/x
  3. Step 3: Cross multiply
    678,415.30x = 1,017,770.55 × 205,088.30
  4. Step 4: Simplify right side
    678,415.30x = 208,732,831,889.57
  5. Step 5: Solve for x
    x = 208,732,831,889.57/678,415.30
  6. Step 6: Final answer
    x = 307,677.07

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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.