Home / 5,385.56-8,078.36-1,490

Finding the Fourth Proportional to 5,385.56, 8,078.36 and 1,490

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Solution

The fourth proportional to 5,385.56, 8,078.36 and 1,490 is: 2,235.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.56 : 8,078.36 = 1,490 : x
  2. Step 2: Convert to fraction form
    5,385.56/8,078.36 = 1,490/x
  3. Step 3: Cross multiply
    5,385.56x = 8,078.36 × 1,490
  4. Step 4: Simplify right side
    5,385.56x = 12,036,756.40
  5. Step 5: Solve for x
    x = 12,036,756.40/5,385.56
  6. Step 6: Final answer
    x = 2,235.01

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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.