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Finding the Fourth Proportional to 679,287.50, 937,177.80 and 407,443.40

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Solution

The fourth proportional to 679,287.50, 937,177.80 and 407,443.40 is: 562,128.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,287.50 : 937,177.80 = 407,443.40 : x
  2. Step 2: Convert to fraction form
    679,287.50/937,177.80 = 407,443.40/x
  3. Step 3: Cross multiply
    679,287.50x = 937,177.80 × 407,443.40
  4. Step 4: Simplify right side
    679,287.50x = 381,846,909,236.52
  5. Step 5: Solve for x
    x = 381,846,909,236.52/679,287.50
  6. Step 6: Final answer
    x = 562,128.57

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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.