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Finding the Fourth Proportional to 661,947.60, 992,435.40 and 262,390.80

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Solution

The fourth proportional to 661,947.60, 992,435.40 and 262,390.80 is: 393,393.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,947.60 : 992,435.40 = 262,390.80 : x
  2. Step 2: Convert to fraction form
    661,947.60/992,435.40 = 262,390.80/x
  3. Step 3: Cross multiply
    661,947.60x = 992,435.40 × 262,390.80
  4. Step 4: Simplify right side
    661,947.60x = 260,405,918,554.32
  5. Step 5: Solve for x
    x = 260,405,918,554.32/661,947.60
  6. Step 6: Final answer
    x = 393,393.55

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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.