Home / 1,397.37-1,927.10-1,210.77

Finding the Fourth Proportional to 1,397.37, 1,927.10 and 1,210.77

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Solution

The fourth proportional to 1,397.37, 1,927.10 and 1,210.77 is: 1,669.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.37 : 1,927.10 = 1,210.77 : x
  2. Step 2: Convert to fraction form
    1,397.37/1,927.10 = 1,210.77/x
  3. Step 3: Cross multiply
    1,397.37x = 1,927.10 × 1,210.77
  4. Step 4: Simplify right side
    1,397.37x = 2,333,268.81
  5. Step 5: Solve for x
    x = 2,333,268.81/1,397.37
  6. Step 6: Final answer
    x = 1,669.76

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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.