Home / 1,312.02-1,810.61-722.56

Finding the Fourth Proportional to 1,312.02, 1,810.61 and 722.56

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Solution

The fourth proportional to 1,312.02, 1,810.61 and 722.56 is: 997.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.02 : 1,810.61 = 722.56 : x
  2. Step 2: Convert to fraction form
    1,312.02/1,810.61 = 722.56/x
  3. Step 3: Cross multiply
    1,312.02x = 1,810.61 × 722.56
  4. Step 4: Simplify right side
    1,312.02x = 1,308,274.36
  5. Step 5: Solve for x
    x = 1,308,274.36/1,312.02
  6. Step 6: Final answer
    x = 997.15

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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.