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Finding the Fourth Proportional to 456,707.40, 685,061.10 and 438,336.60

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Solution

The fourth proportional to 456,707.40, 685,061.10 and 438,336.60 is: 657,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,707.40 : 685,061.10 = 438,336.60 : x
  2. Step 2: Convert to fraction form
    456,707.40/685,061.10 = 438,336.60/x
  3. Step 3: Cross multiply
    456,707.40x = 685,061.10 × 438,336.60
  4. Step 4: Simplify right side
    456,707.40x = 300,287,353,366.26
  5. Step 5: Solve for x
    x = 300,287,353,366.26/456,707.40
  6. Step 6: Final answer
    x = 657,504.90

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Similar ratio
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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.