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Finding the Fourth Proportional to 1,386.69, 1,913.37 and 1,303.74

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Solution

The fourth proportional to 1,386.69, 1,913.37 and 1,303.74 is: 1,798.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.69 : 1,913.37 = 1,303.74 : x
  2. Step 2: Convert to fraction form
    1,386.69/1,913.37 = 1,303.74/x
  3. Step 3: Cross multiply
    1,386.69x = 1,913.37 × 1,303.74
  4. Step 4: Simplify right side
    1,386.69x = 2,494,537.00
  5. Step 5: Solve for x
    x = 2,494,537.00/1,386.69
  6. Step 6: Final answer
    x = 1,798.91

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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.