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Finding the Fourth Proportional to 656,504.40, 905,975.19 and 354,698.40

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Solution

The fourth proportional to 656,504.40, 905,975.19 and 354,698.40 is: 489,483.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,504.40 : 905,975.19 = 354,698.40 : x
  2. Step 2: Convert to fraction form
    656,504.40/905,975.19 = 354,698.40/x
  3. Step 3: Cross multiply
    656,504.40x = 905,975.19 × 354,698.40
  4. Step 4: Simplify right side
    656,504.40x = 321,347,950,332.70
  5. Step 5: Solve for x
    x = 321,347,950,332.70/656,504.40
  6. Step 6: Final answer
    x = 489,483.32

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Double scale
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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.