Home / 1,242,021.20-1,863,031.80-816,868.40

Finding the Fourth Proportional to 1,242,021.20, 1,863,031.80 and 816,868.40

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Solution

The fourth proportional to 1,242,021.20, 1,863,031.80 and 816,868.40 is: 1,225,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,021.20 : 1,863,031.80 = 816,868.40 : x
  2. Step 2: Convert to fraction form
    1,242,021.20/1,863,031.80 = 816,868.40/x
  3. Step 3: Cross multiply
    1,242,021.20x = 1,863,031.80 × 816,868.40
  4. Step 4: Simplify right side
    1,242,021.20x = 1,521,851,805,615.12
  5. Step 5: Solve for x
    x = 1,521,851,805,615.12/1,242,021.20
  6. Step 6: Final answer
    x = 1,225,302.60

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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.