Home / 1,298,389.40-1,946,028.90-666,978.20

Finding the Fourth Proportional to 1,298,389.40, 1,946,028.90 and 666,978.20

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Solution

The fourth proportional to 1,298,389.40, 1,946,028.90 and 666,978.20 is: 999,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,389.40 : 1,946,028.90 = 666,978.20 : x
  2. Step 2: Convert to fraction form
    1,298,389.40/1,946,028.90 = 666,978.20/x
  3. Step 3: Cross multiply
    1,298,389.40x = 1,946,028.90 × 666,978.20
  4. Step 4: Simplify right side
    1,298,389.40x = 1,297,958,852,869.98
  5. Step 5: Solve for x
    x = 1,297,958,852,869.98/1,298,389.40
  6. Step 6: Final answer
    x = 999,668.40

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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.