Home / 1,317.80-1,977.67-624.47

Finding the Fourth Proportional to 1,317.80, 1,977.67 and 624.47

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Solution

The fourth proportional to 1,317.80, 1,977.67 and 624.47 is: 937.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.80 : 1,977.67 = 624.47 : x
  2. Step 2: Convert to fraction form
    1,317.80/1,977.67 = 624.47/x
  3. Step 3: Cross multiply
    1,317.80x = 1,977.67 × 624.47
  4. Step 4: Simplify right side
    1,317.80x = 1,234,986.48
  5. Step 5: Solve for x
    x = 1,234,986.48/1,317.80
  6. Step 6: Final answer
    x = 937.16

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1.5x scale

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.