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Finding the Fourth Proportional to 571,180.80, 856,771.20 and 438,470.40

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Solution

The fourth proportional to 571,180.80, 856,771.20 and 438,470.40 is: 657,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,180.80 : 856,771.20 = 438,470.40 : x
  2. Step 2: Convert to fraction form
    571,180.80/856,771.20 = 438,470.40/x
  3. Step 3: Cross multiply
    571,180.80x = 856,771.20 × 438,470.40
  4. Step 4: Simplify right side
    571,180.80x = 375,668,810,772.48
  5. Step 5: Solve for x
    x = 375,668,810,772.48/571,180.80
  6. Step 6: Final answer
    x = 657,705.60

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Double scale
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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.