Home / 642,939.12-962,516.80-429,176.82

Finding the Fourth Proportional to 642,939.12, 962,516.80 and 429,176.82

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Solution

The fourth proportional to 642,939.12, 962,516.80 and 429,176.82 is: 642,502.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,939.12 : 962,516.80 = 429,176.82 : x
  2. Step 2: Convert to fraction form
    642,939.12/962,516.80 = 429,176.82/x
  3. Step 3: Cross multiply
    642,939.12x = 962,516.80 × 429,176.82
  4. Step 4: Simplify right side
    642,939.12x = 413,089,899,420.58
  5. Step 5: Solve for x
    x = 413,089,899,420.58/642,939.12
  6. Step 6: Final answer
    x = 642,502.36

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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.