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Finding the Fourth Proportional to 404.18, 557.51 and 304.75

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Solution

The fourth proportional to 404.18, 557.51 and 304.75 is: 420.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.18 : 557.51 = 304.75 : x
  2. Step 2: Convert to fraction form
    404.18/557.51 = 304.75/x
  3. Step 3: Cross multiply
    404.18x = 557.51 × 304.75
  4. Step 4: Simplify right side
    404.18x = 169,901.17
  5. Step 5: Solve for x
    x = 169,901.17/404.18
  6. Step 6: Final answer
    x = 420.36

Related Problems

Find fourth proportional to 202.09, 278.76 and 152.38
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.