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Finding the Fourth Proportional to 674,853.60, 931,269.60 and 388,383.60

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Solution

The fourth proportional to 674,853.60, 931,269.60 and 388,383.60 is: 535,953.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,853.60 : 931,269.60 = 388,383.60 : x
  2. Step 2: Convert to fraction form
    674,853.60/931,269.60 = 388,383.60/x
  3. Step 3: Cross multiply
    674,853.60x = 931,269.60 × 388,383.60
  4. Step 4: Simplify right side
    674,853.60x = 361,689,839,818.56
  5. Step 5: Solve for x
    x = 361,689,839,818.56/674,853.60
  6. Step 6: Final answer
    x = 535,953.04

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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.