Home / 912,021.20-1,368,031.80-281,128.40

Finding the Fourth Proportional to 912,021.20, 1,368,031.80 and 281,128.40

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Solution

The fourth proportional to 912,021.20, 1,368,031.80 and 281,128.40 is: 421,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,021.20 : 1,368,031.80 = 281,128.40 : x
  2. Step 2: Convert to fraction form
    912,021.20/1,368,031.80 = 281,128.40/x
  3. Step 3: Cross multiply
    912,021.20x = 1,368,031.80 × 281,128.40
  4. Step 4: Simplify right side
    912,021.20x = 384,592,591,083.12
  5. Step 5: Solve for x
    x = 384,592,591,083.12/912,021.20
  6. Step 6: Final answer
    x = 421,692.60

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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.