Home / 678,558.40-1,017,643.20-205,129.60

Finding the Fourth Proportional to 678,558.40, 1,017,643.20 and 205,129.60

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Solution

The fourth proportional to 678,558.40, 1,017,643.20 and 205,129.60 is: 307,635.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,558.40 : 1,017,643.20 = 205,129.60 : x
  2. Step 2: Convert to fraction form
    678,558.40/1,017,643.20 = 205,129.60/x
  3. Step 3: Cross multiply
    678,558.40x = 1,017,643.20 × 205,129.60
  4. Step 4: Simplify right side
    678,558.40x = 208,748,742,558.72
  5. Step 5: Solve for x
    x = 208,748,742,558.72/678,558.40
  6. Step 6: Final answer
    x = 307,635.63

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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.