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Finding the Fourth Proportional to 540,342.63, 745,623.83 and 310,838.85

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Solution

The fourth proportional to 540,342.63, 745,623.83 and 310,838.85 is: 428,929.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,342.63 : 745,623.83 = 310,838.85 : x
  2. Step 2: Convert to fraction form
    540,342.63/745,623.83 = 310,838.85/x
  3. Step 3: Cross multiply
    540,342.63x = 745,623.83 × 310,838.85
  4. Step 4: Simplify right side
    540,342.63x = 231,768,854,626.89
  5. Step 5: Solve for x
    x = 231,768,854,626.89/540,342.63
  6. Step 6: Final answer
    x = 428,929.43

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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.