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Finding the Fourth Proportional to 486,500.40, 729,750.60 and 318,538.80

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Solution

The fourth proportional to 486,500.40, 729,750.60 and 318,538.80 is: 477,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,500.40 : 729,750.60 = 318,538.80 : x
  2. Step 2: Convert to fraction form
    486,500.40/729,750.60 = 318,538.80/x
  3. Step 3: Cross multiply
    486,500.40x = 729,750.60 × 318,538.80
  4. Step 4: Simplify right side
    486,500.40x = 232,453,880,423.28
  5. Step 5: Solve for x
    x = 232,453,880,423.28/486,500.40
  6. Step 6: Final answer
    x = 477,808.20

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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.