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Finding the Fourth Proportional to 426,128.42, 639,477.76 and 176,810.42

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Solution

The fourth proportional to 426,128.42, 639,477.76 and 176,810.42 is: 265,333.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,128.42 : 639,477.76 = 176,810.42 : x
  2. Step 2: Convert to fraction form
    426,128.42/639,477.76 = 176,810.42/x
  3. Step 3: Cross multiply
    426,128.42x = 639,477.76 × 176,810.42
  4. Step 4: Simplify right side
    426,128.42x = 113,066,331,326.26
  5. Step 5: Solve for x
    x = 113,066,331,326.26/426,128.42
  6. Step 6: Final answer
    x = 265,333.94

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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.