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Finding the Fourth Proportional to 670,281.40, 1,005,470.70 and 403,467.40

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Solution

The fourth proportional to 670,281.40, 1,005,470.70 and 403,467.40 is: 605,230.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,281.40 : 1,005,470.70 = 403,467.40 : x
  2. Step 2: Convert to fraction form
    670,281.40/1,005,470.70 = 403,467.40/x
  3. Step 3: Cross multiply
    670,281.40x = 1,005,470.70 × 403,467.40
  4. Step 4: Simplify right side
    670,281.40x = 405,674,649,105.18
  5. Step 5: Solve for x
    x = 405,674,649,105.18/670,281.40
  6. Step 6: Final answer
    x = 605,230.35

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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.