Home / 989,905.80-1,484,858.70-358,840.20

Finding the Fourth Proportional to 989,905.80, 1,484,858.70 and 358,840.20

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Solution

The fourth proportional to 989,905.80, 1,484,858.70 and 358,840.20 is: 538,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,905.80 : 1,484,858.70 = 358,840.20 : x
  2. Step 2: Convert to fraction form
    989,905.80/1,484,858.70 = 358,840.20/x
  3. Step 3: Cross multiply
    989,905.80x = 1,484,858.70 × 358,840.20
  4. Step 4: Simplify right side
    989,905.80x = 532,826,992,879.74
  5. Step 5: Solve for x
    x = 532,826,992,879.74/989,905.80
  6. Step 6: Final answer
    x = 538,260.30

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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.