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Finding the Fourth Proportional to 1,053.40, 1,579.98 and 404.08

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Solution

The fourth proportional to 1,053.40, 1,579.98 and 404.08 is: 606.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.40 : 1,579.98 = 404.08 : x
  2. Step 2: Convert to fraction form
    1,053.40/1,579.98 = 404.08/x
  3. Step 3: Cross multiply
    1,053.40x = 1,579.98 × 404.08
  4. Step 4: Simplify right side
    1,053.40x = 638,438.32
  5. Step 5: Solve for x
    x = 638,438.32/1,053.40
  6. Step 6: Final answer
    x = 606.07

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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.