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Finding the Fourth Proportional to 311,378.16, 429,699.88 and 175,455.89

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Solution

The fourth proportional to 311,378.16, 429,699.88 and 175,455.89 is: 242,128.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,378.16 : 429,699.88 = 175,455.89 : x
  2. Step 2: Convert to fraction form
    311,378.16/429,699.88 = 175,455.89/x
  3. Step 3: Cross multiply
    311,378.16x = 429,699.88 × 175,455.89
  4. Step 4: Simplify right side
    311,378.16x = 75,393,372,949.11
  5. Step 5: Solve for x
    x = 75,393,372,949.11/311,378.16
  6. Step 6: Final answer
    x = 242,128.00

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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.