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Finding the Fourth Proportional to 879,886.72, 1,214,243.66 and 477,478.72

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Solution

The fourth proportional to 879,886.72, 1,214,243.66 and 477,478.72 is: 658,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,886.72 : 1,214,243.66 = 477,478.72 : x
  2. Step 2: Convert to fraction form
    879,886.72/1,214,243.66 = 477,478.72/x
  3. Step 3: Cross multiply
    879,886.72x = 1,214,243.66 × 477,478.72
  4. Step 4: Simplify right side
    879,886.72x = 579,775,508,544.92
  5. Step 5: Solve for x
    x = 579,775,508,544.92/879,886.72
  6. Step 6: Final answer
    x = 658,920.63

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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.