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Finding the Fourth Proportional to 545,006.63, 817,676.40 and 278,955.65

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Solution

The fourth proportional to 545,006.63, 817,676.40 and 278,955.65 is: 418,518.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,006.63 : 817,676.40 = 278,955.65 : x
  2. Step 2: Convert to fraction form
    545,006.63/817,676.40 = 278,955.65/x
  3. Step 3: Cross multiply
    545,006.63x = 817,676.40 × 278,955.65
  4. Step 4: Simplify right side
    545,006.63x = 228,095,447,563.28
  5. Step 5: Solve for x
    x = 228,095,447,563.28/545,006.63
  6. Step 6: Final answer
    x = 418,518.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.