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Finding the Fourth Proportional to 342,299.88, 512,666.28 and 208,886.40

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Solution

The fourth proportional to 342,299.88, 512,666.28 and 208,886.40 is: 312,851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,299.88 : 512,666.28 = 208,886.40 : x
  2. Step 2: Convert to fraction form
    342,299.88/512,666.28 = 208,886.40/x
  3. Step 3: Cross multiply
    342,299.88x = 512,666.28 × 208,886.40
  4. Step 4: Simplify right side
    342,299.88x = 107,089,013,630.59
  5. Step 5: Solve for x
    x = 107,089,013,630.59/342,299.88
  6. Step 6: Final answer
    x = 312,851.45

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1.5x scale

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.