Home / 1,407.36-1,942.10-777.86

Finding the Fourth Proportional to 1,407.36, 1,942.10 and 777.86

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Solution

The fourth proportional to 1,407.36, 1,942.10 and 777.86 is: 1,073.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.36 : 1,942.10 = 777.86 : x
  2. Step 2: Convert to fraction form
    1,407.36/1,942.10 = 777.86/x
  3. Step 3: Cross multiply
    1,407.36x = 1,942.10 × 777.86
  4. Step 4: Simplify right side
    1,407.36x = 1,510,681.91
  5. Step 5: Solve for x
    x = 1,510,681.91/1,407.36
  6. Step 6: Final answer
    x = 1,073.42

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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.