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Finding the Fourth Proportional to 1,307.04, 1,807.20 and 1,143.04

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Solution

The fourth proportional to 1,307.04, 1,807.20 and 1,143.04 is: 1,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.04 : 1,807.20 = 1,143.04 : x
  2. Step 2: Convert to fraction form
    1,307.04/1,807.20 = 1,143.04/x
  3. Step 3: Cross multiply
    1,307.04x = 1,807.20 × 1,143.04
  4. Step 4: Simplify right side
    1,307.04x = 2,065,701.89
  5. Step 5: Solve for x
    x = 2,065,701.89/1,307.04
  6. Step 6: Final answer
    x = 1,580.44

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1.5x scale

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.