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Finding the Fourth Proportional to 614,409.40, 921,743.70 and 259,240.60

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Solution

The fourth proportional to 614,409.40, 921,743.70 and 259,240.60 is: 388,915.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,409.40 : 921,743.70 = 259,240.60 : x
  2. Step 2: Convert to fraction form
    614,409.40/921,743.70 = 259,240.60/x
  3. Step 3: Cross multiply
    614,409.40x = 921,743.70 × 259,240.60
  4. Step 4: Simplify right side
    614,409.40x = 238,953,389,834.22
  5. Step 5: Solve for x
    x = 238,953,389,834.22/614,409.40
  6. Step 6: Final answer
    x = 388,915.58

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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.