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Finding the Fourth Proportional to 571,280.80, 856,921.20 and 144,815.80

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Solution

The fourth proportional to 571,280.80, 856,921.20 and 144,815.80 is: 217,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,280.80 : 856,921.20 = 144,815.80 : x
  2. Step 2: Convert to fraction form
    571,280.80/856,921.20 = 144,815.80/x
  3. Step 3: Cross multiply
    571,280.80x = 856,921.20 × 144,815.80
  4. Step 4: Simplify right side
    571,280.80x = 124,095,729,114.96
  5. Step 5: Solve for x
    x = 124,095,729,114.96/571,280.80
  6. Step 6: Final answer
    x = 217,223.70

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Half scale
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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.