Home / 1,345.02-2,017.59-420.67

Finding the Fourth Proportional to 1,345.02, 2,017.59 and 420.67

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Solution

The fourth proportional to 1,345.02, 2,017.59 and 420.67 is: 631.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.02 : 2,017.59 = 420.67 : x
  2. Step 2: Convert to fraction form
    1,345.02/2,017.59 = 420.67/x
  3. Step 3: Cross multiply
    1,345.02x = 2,017.59 × 420.67
  4. Step 4: Simplify right side
    1,345.02x = 848,739.59
  5. Step 5: Solve for x
    x = 848,739.59/1,345.02
  6. Step 6: Final answer
    x = 631.02

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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.