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Finding the Fourth Proportional to 1,018.95, 1,528.70 and 433.98

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Solution

The fourth proportional to 1,018.95, 1,528.70 and 433.98 is: 651.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.95 : 1,528.70 = 433.98 : x
  2. Step 2: Convert to fraction form
    1,018.95/1,528.70 = 433.98/x
  3. Step 3: Cross multiply
    1,018.95x = 1,528.70 × 433.98
  4. Step 4: Simplify right side
    1,018.95x = 663,425.23
  5. Step 5: Solve for x
    x = 663,425.23/1,018.95
  6. Step 6: Final answer
    x = 651.09

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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.