Home / 1,526.80-2,289.72-430.90

Finding the Fourth Proportional to 1,526.80, 2,289.72 and 430.90

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Solution

The fourth proportional to 1,526.80, 2,289.72 and 430.90 is: 646.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,526.80 : 2,289.72 = 430.90 : x
  2. Step 2: Convert to fraction form
    1,526.80/2,289.72 = 430.90/x
  3. Step 3: Cross multiply
    1,526.80x = 2,289.72 × 430.90
  4. Step 4: Simplify right side
    1,526.80x = 986,640.35
  5. Step 5: Solve for x
    x = 986,640.35/1,526.80
  6. Step 6: Final answer
    x = 646.21

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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.