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Finding the Fourth Proportional to 656,148.42, 905,484.78 and 354,342.42

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Solution

The fourth proportional to 656,148.42, 905,484.78 and 354,342.42 is: 488,992.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,148.42 : 905,484.78 = 354,342.42 : x
  2. Step 2: Convert to fraction form
    656,148.42/905,484.78 = 354,342.42/x
  3. Step 3: Cross multiply
    656,148.42x = 905,484.78 × 354,342.42
  4. Step 4: Simplify right side
    656,148.42x = 320,851,668,218.37
  5. Step 5: Solve for x
    x = 320,851,668,218.37/656,148.42
  6. Step 6: Final answer
    x = 488,992.52

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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.