Home / 1,385,290.40-2,078,000.40-438,735.20

Finding the Fourth Proportional to 1,385,290.40, 2,078,000.40 and 438,735.20

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Solution

The fourth proportional to 1,385,290.40, 2,078,000.40 and 438,735.20 is: 658,123.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,290.40 : 2,078,000.40 = 438,735.20 : x
  2. Step 2: Convert to fraction form
    1,385,290.40/2,078,000.40 = 438,735.20/x
  3. Step 3: Cross multiply
    1,385,290.40x = 2,078,000.40 × 438,735.20
  4. Step 4: Simplify right side
    1,385,290.40x = 911,691,921,094.08
  5. Step 5: Solve for x
    x = 911,691,921,094.08/1,385,290.40
  6. Step 6: Final answer
    x = 658,123.32

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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.