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Finding the Fourth Proportional to 405,920.40, 609,053.40 and 256,275.60

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Solution

The fourth proportional to 405,920.40, 609,053.40 and 256,275.60 is: 384,522.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,920.40 : 609,053.40 = 256,275.60 : x
  2. Step 2: Convert to fraction form
    405,920.40/609,053.40 = 256,275.60/x
  3. Step 3: Cross multiply
    405,920.40x = 609,053.40 × 256,275.60
  4. Step 4: Simplify right side
    405,920.40x = 156,085,525,517.04
  5. Step 5: Solve for x
    x = 156,085,525,517.04/405,920.40
  6. Step 6: Final answer
    x = 384,522.50

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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.