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Finding the Fourth Proportional to 2,528.04, 3,792.06 and 989

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Solution

The fourth proportional to 2,528.04, 3,792.06 and 989 is: 1,483.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,528.04 : 3,792.06 = 989 : x
  2. Step 2: Convert to fraction form
    2,528.04/3,792.06 = 989/x
  3. Step 3: Cross multiply
    2,528.04x = 3,792.06 × 989
  4. Step 4: Simplify right side
    2,528.04x = 3,750,347.34
  5. Step 5: Solve for x
    x = 3,750,347.34/2,528.04
  6. Step 6: Final answer
    x = 1,483.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,529.04, 3,793.56 and 990
Similar ratio
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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.