Home / 1,355.08-2,032.98-430.66

Finding the Fourth Proportional to 1,355.08, 2,032.98 and 430.66

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Solution

The fourth proportional to 1,355.08, 2,032.98 and 430.66 is: 646.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.08 : 2,032.98 = 430.66 : x
  2. Step 2: Convert to fraction form
    1,355.08/2,032.98 = 430.66/x
  3. Step 3: Cross multiply
    1,355.08x = 2,032.98 × 430.66
  4. Step 4: Simplify right side
    1,355.08x = 875,523.17
  5. Step 5: Solve for x
    x = 875,523.17/1,355.08
  6. Step 6: Final answer
    x = 646.10

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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.