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Finding the Fourth Proportional to 391,307.53, 540,013.04 and 219,238.21

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Solution

The fourth proportional to 391,307.53, 540,013.04 and 219,238.21 is: 302,553.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,307.53 : 540,013.04 = 219,238.21 : x
  2. Step 2: Convert to fraction form
    391,307.53/540,013.04 = 219,238.21/x
  3. Step 3: Cross multiply
    391,307.53x = 540,013.04 × 219,238.21
  4. Step 4: Simplify right side
    391,307.53x = 118,391,492,266.26
  5. Step 5: Solve for x
    x = 118,391,492,266.26/391,307.53
  6. Step 6: Final answer
    x = 302,553.58

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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.