Home / 1,289,421.60-1,935,007.20-839,045.40

Finding the Fourth Proportional to 1,289,421.60, 1,935,007.20 and 839,045.40

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Solution

The fourth proportional to 1,289,421.60, 1,935,007.20 and 839,045.40 is: 1,259,137.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,421.60 : 1,935,007.20 = 839,045.40 : x
  2. Step 2: Convert to fraction form
    1,289,421.60/1,935,007.20 = 839,045.40/x
  3. Step 3: Cross multiply
    1,289,421.60x = 1,935,007.20 × 839,045.40
  4. Step 4: Simplify right side
    1,289,421.60x = 1,623,558,890,126.88
  5. Step 5: Solve for x
    x = 1,623,558,890,126.88/1,289,421.60
  6. Step 6: Final answer
    x = 1,259,137.35

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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.