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Finding the Fourth Proportional to 1,130.02, 1,695.03 and 399.40

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Solution

The fourth proportional to 1,130.02, 1,695.03 and 399.40 is: 599.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.02 : 1,695.03 = 399.40 : x
  2. Step 2: Convert to fraction form
    1,130.02/1,695.03 = 399.40/x
  3. Step 3: Cross multiply
    1,130.02x = 1,695.03 × 399.40
  4. Step 4: Simplify right side
    1,130.02x = 676,994.98
  5. Step 5: Solve for x
    x = 676,994.98/1,130.02
  6. Step 6: Final answer
    x = 599.10

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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.