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Finding the Fourth Proportional to 1,307.46, 1,802.94 and 909.57

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Solution

The fourth proportional to 1,307.46, 1,802.94 and 909.57 is: 1,254.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.46 : 1,802.94 = 909.57 : x
  2. Step 2: Convert to fraction form
    1,307.46/1,802.94 = 909.57/x
  3. Step 3: Cross multiply
    1,307.46x = 1,802.94 × 909.57
  4. Step 4: Simplify right side
    1,307.46x = 1,639,900.14
  5. Step 5: Solve for x
    x = 1,639,900.14/1,307.46
  6. Step 6: Final answer
    x = 1,254.26

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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.