Home / 895.56-1,345.65-840.21

Finding the Fourth Proportional to 895.56, 1,345.65 and 840.21

Calculator

Solution

The fourth proportional to 895.56, 1,345.65 and 840.21 is: 1,262.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.56 : 1,345.65 = 840.21 : x
  2. Step 2: Convert to fraction form
    895.56/1,345.65 = 840.21/x
  3. Step 3: Cross multiply
    895.56x = 1,345.65 × 840.21
  4. Step 4: Simplify right side
    895.56x = 1,130,628.59
  5. Step 5: Solve for x
    x = 1,130,628.59/895.56
  6. Step 6: Final answer
    x = 1,262.48

Related Problems

Find fourth proportional to 447.78, 672.83 and 420.11
Half scale
Find fourth proportional to 1,791.12, 2,691.30 and 1,680.42
Double scale
Find fourth proportional to 896.56, 1,347.15 and 841.21
Similar ratio
Find fourth proportional to 1,343.34, 2,018.48 and 1,260.32
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.