Home / 989,438.40-1,484,157.60-390,200.40

Finding the Fourth Proportional to 989,438.40, 1,484,157.60 and 390,200.40

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Solution

The fourth proportional to 989,438.40, 1,484,157.60 and 390,200.40 is: 585,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,438.40 : 1,484,157.60 = 390,200.40 : x
  2. Step 2: Convert to fraction form
    989,438.40/1,484,157.60 = 390,200.40/x
  3. Step 3: Cross multiply
    989,438.40x = 1,484,157.60 × 390,200.40
  4. Step 4: Simplify right side
    989,438.40x = 579,118,889,183.04
  5. Step 5: Solve for x
    x = 579,118,889,183.04/989,438.40
  6. Step 6: Final answer
    x = 585,300.60

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Double scale
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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.