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Finding the Fourth Proportional to 1,465, 2,021.70 and 913.32

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Solution

The fourth proportional to 1,465, 2,021.70 and 913.32 is: 1,260.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465 : 2,021.70 = 913.32 : x
  2. Step 2: Convert to fraction form
    1,465/2,021.70 = 913.32/x
  3. Step 3: Cross multiply
    1,465x = 2,021.70 × 913.32
  4. Step 4: Simplify right side
    1,465x = 1,846,459.04
  5. Step 5: Solve for x
    x = 1,846,459.04/1,465
  6. Step 6: Final answer
    x = 1,260.38

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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.