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Finding the Fourth Proportional to 722,783.62, 997,443.21 and 400,491.10

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Solution

The fourth proportional to 722,783.62, 997,443.21 and 400,491.10 is: 552,678.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,783.62 : 997,443.21 = 400,491.10 : x
  2. Step 2: Convert to fraction form
    722,783.62/997,443.21 = 400,491.10/x
  3. Step 3: Cross multiply
    722,783.62x = 997,443.21 × 400,491.10
  4. Step 4: Simplify right side
    722,783.62x = 399,467,128,360.43
  5. Step 5: Solve for x
    x = 399,467,128,360.43/722,783.62
  6. Step 6: Final answer
    x = 552,678.72

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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.