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Finding the Fourth Proportional to 318,952.76, 440,630.70 and 257,607.40

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Solution

The fourth proportional to 318,952.76, 440,630.70 and 257,607.40 is: 355,882.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,952.76 : 440,630.70 = 257,607.40 : x
  2. Step 2: Convert to fraction form
    318,952.76/440,630.70 = 257,607.40/x
  3. Step 3: Cross multiply
    318,952.76x = 440,630.70 × 257,607.40
  4. Step 4: Simplify right side
    318,952.76x = 113,509,728,987.18
  5. Step 5: Solve for x
    x = 113,509,728,987.18/318,952.76
  6. Step 6: Final answer
    x = 355,882.57

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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.