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Finding the Fourth Proportional to 760.98, 1,049.18 and 620.96

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Solution

The fourth proportional to 760.98, 1,049.18 and 620.96 is: 856.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.98 : 1,049.18 = 620.96 : x
  2. Step 2: Convert to fraction form
    760.98/1,049.18 = 620.96/x
  3. Step 3: Cross multiply
    760.98x = 1,049.18 × 620.96
  4. Step 4: Simplify right side
    760.98x = 651,490.46
  5. Step 5: Solve for x
    x = 651,490.46/760.98
  6. Step 6: Final answer
    x = 856.12

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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.