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Finding the Fourth Proportional to 533,721.72, 736,415.40 and 318,819.72

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Solution

The fourth proportional to 533,721.72, 736,415.40 and 318,819.72 is: 439,899.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    533,721.72 : 736,415.40 = 318,819.72 : x
  2. Step 2: Convert to fraction form
    533,721.72/736,415.40 = 318,819.72/x
  3. Step 3: Cross multiply
    533,721.72x = 736,415.40 × 318,819.72
  4. Step 4: Simplify right side
    533,721.72x = 234,783,751,631.69
  5. Step 5: Solve for x
    x = 234,783,751,631.69/533,721.72
  6. Step 6: Final answer
    x = 439,899.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.