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Finding the Fourth Proportional to 894.95, 1,341.95 and 278.40

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Solution

The fourth proportional to 894.95, 1,341.95 and 278.40 is: 417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.95 : 1,341.95 = 278.40 : x
  2. Step 2: Convert to fraction form
    894.95/1,341.95 = 278.40/x
  3. Step 3: Cross multiply
    894.95x = 1,341.95 × 278.40
  4. Step 4: Simplify right side
    894.95x = 373,597.49
  5. Step 5: Solve for x
    x = 373,597.49/894.95
  6. Step 6: Final answer
    x = 417.45

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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.