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Finding the Fourth Proportional to 977.12, 1,465.88 and 400

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Solution

The fourth proportional to 977.12, 1,465.88 and 400 is: 600.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.12 : 1,465.88 = 400 : x
  2. Step 2: Convert to fraction form
    977.12/1,465.88 = 400/x
  3. Step 3: Cross multiply
    977.12x = 1,465.88 × 400
  4. Step 4: Simplify right side
    977.12x = 586,352
  5. Step 5: Solve for x
    x = 586,352/977.12
  6. Step 6: Final answer
    x = 600.08

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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.