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Finding the Fourth Proportional to 391,252.07, 540,354.04 and 315,023.58

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Solution

The fourth proportional to 391,252.07, 540,354.04 and 315,023.58 is: 435,075.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,252.07 : 540,354.04 = 315,023.58 : x
  2. Step 2: Convert to fraction form
    391,252.07/540,354.04 = 315,023.58/x
  3. Step 3: Cross multiply
    391,252.07x = 540,354.04 × 315,023.58
  4. Step 4: Simplify right side
    391,252.07x = 170,224,263,360.70
  5. Step 5: Solve for x
    x = 170,224,263,360.70/391,252.07
  6. Step 6: Final answer
    x = 435,075.68

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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.