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Finding the Fourth Proportional to 634,009.72, 874,944 and 343,630.58

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Solution

The fourth proportional to 634,009.72, 874,944 and 343,630.58 is: 474,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,009.72 : 874,944 = 343,630.58 : x
  2. Step 2: Convert to fraction form
    634,009.72/874,944 = 343,630.58/x
  3. Step 3: Cross multiply
    634,009.72x = 874,944 × 343,630.58
  4. Step 4: Simplify right side
    634,009.72x = 300,657,514,187.52
  5. Step 5: Solve for x
    x = 300,657,514,187.52/634,009.72
  6. Step 6: Final answer
    x = 474,215.94

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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.