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Finding the Fourth Proportional to 1,564.54, 2,346.78 and 907.40

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Solution

The fourth proportional to 1,564.54, 2,346.78 and 907.40 is: 1,361.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.54 : 2,346.78 = 907.40 : x
  2. Step 2: Convert to fraction form
    1,564.54/2,346.78 = 907.40/x
  3. Step 3: Cross multiply
    1,564.54x = 2,346.78 × 907.40
  4. Step 4: Simplify right side
    1,564.54x = 2,129,468.17
  5. Step 5: Solve for x
    x = 2,129,468.17/1,564.54
  6. Step 6: Final answer
    x = 1,361.08

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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.