Home / 989,155.20-1,484,121.60-390,014.40

Finding the Fourth Proportional to 989,155.20, 1,484,121.60 and 390,014.40

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Solution

The fourth proportional to 989,155.20, 1,484,121.60 and 390,014.40 is: 585,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,155.20 : 1,484,121.60 = 390,014.40 : x
  2. Step 2: Convert to fraction form
    989,155.20/1,484,121.60 = 390,014.40/x
  3. Step 3: Cross multiply
    989,155.20x = 1,484,121.60 × 390,014.40
  4. Step 4: Simplify right side
    989,155.20x = 578,828,795,351.04
  5. Step 5: Solve for x
    x = 578,828,795,351.04/989,155.20
  6. Step 6: Final answer
    x = 585,174.90

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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.