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Finding the Fourth Proportional to 371,459.70, 557,189.55 and 318,315.60

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Solution

The fourth proportional to 371,459.70, 557,189.55 and 318,315.60 is: 477,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,459.70 : 557,189.55 = 318,315.60 : x
  2. Step 2: Convert to fraction form
    371,459.70/557,189.55 = 318,315.60/x
  3. Step 3: Cross multiply
    371,459.70x = 557,189.55 × 318,315.60
  4. Step 4: Simplify right side
    371,459.70x = 177,362,125,921.98
  5. Step 5: Solve for x
    x = 177,362,125,921.98/371,459.70
  6. Step 6: Final answer
    x = 477,473.40

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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.