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Finding the Fourth Proportional to 519,236.40, 778,854.60 and 318,907.20

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Solution

The fourth proportional to 519,236.40, 778,854.60 and 318,907.20 is: 478,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,236.40 : 778,854.60 = 318,907.20 : x
  2. Step 2: Convert to fraction form
    519,236.40/778,854.60 = 318,907.20/x
  3. Step 3: Cross multiply
    519,236.40x = 778,854.60 × 318,907.20
  4. Step 4: Simplify right side
    519,236.40x = 248,382,339,693.12
  5. Step 5: Solve for x
    x = 248,382,339,693.12/519,236.40
  6. Step 6: Final answer
    x = 478,360.80

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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.