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Finding the Fourth Proportional to 566,270.78, 781,453.80 and 311,621.97

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Solution

The fourth proportional to 566,270.78, 781,453.80 and 311,621.97 is: 430,038.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,270.78 : 781,453.80 = 311,621.97 : x
  2. Step 2: Convert to fraction form
    566,270.78/781,453.80 = 311,621.97/x
  3. Step 3: Cross multiply
    566,270.78x = 781,453.80 × 311,621.97
  4. Step 4: Simplify right side
    566,270.78x = 243,518,172,619.99
  5. Step 5: Solve for x
    x = 243,518,172,619.99/566,270.78
  6. Step 6: Final answer
    x = 430,038.39

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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.