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Finding the Fourth Proportional to 292,290.40, 438,435.60 and 280,626.40

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Solution

The fourth proportional to 292,290.40, 438,435.60 and 280,626.40 is: 420,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,290.40 : 438,435.60 = 280,626.40 : x
  2. Step 2: Convert to fraction form
    292,290.40/438,435.60 = 280,626.40/x
  3. Step 3: Cross multiply
    292,290.40x = 438,435.60 × 280,626.40
  4. Step 4: Simplify right side
    292,290.40x = 123,036,604,059.84
  5. Step 5: Solve for x
    x = 123,036,604,059.84/292,290.40
  6. Step 6: Final answer
    x = 420,939.60

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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.