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Finding the Fourth Proportional to 571,392.78, 788,469.03 and 316,722.30

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Solution

The fourth proportional to 571,392.78, 788,469.03 and 316,722.30 is: 437,047.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,392.78 : 788,469.03 = 316,722.30 : x
  2. Step 2: Convert to fraction form
    571,392.78/788,469.03 = 316,722.30/x
  3. Step 3: Cross multiply
    571,392.78x = 788,469.03 × 316,722.30
  4. Step 4: Simplify right side
    571,392.78x = 249,725,724,660.37
  5. Step 5: Solve for x
    x = 249,725,724,660.37/571,392.78
  6. Step 6: Final answer
    x = 437,047.39

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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.