Home / 1,430.18-2,145.05-390.27

Finding the Fourth Proportional to 1,430.18, 2,145.05 and 390.27

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Solution

The fourth proportional to 1,430.18, 2,145.05 and 390.27 is: 585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.18 : 2,145.05 = 390.27 : x
  2. Step 2: Convert to fraction form
    1,430.18/2,145.05 = 390.27/x
  3. Step 3: Cross multiply
    1,430.18x = 2,145.05 × 390.27
  4. Step 4: Simplify right side
    1,430.18x = 837,137.94
  5. Step 5: Solve for x
    x = 837,137.94/1,430.18
  6. Step 6: Final answer
    x = 585.34

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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.