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Finding the Fourth Proportional to 403,220.40, 604,830.60 and 328,570.80

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Solution

The fourth proportional to 403,220.40, 604,830.60 and 328,570.80 is: 492,856.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,220.40 : 604,830.60 = 328,570.80 : x
  2. Step 2: Convert to fraction form
    403,220.40/604,830.60 = 328,570.80/x
  3. Step 3: Cross multiply
    403,220.40x = 604,830.60 × 328,570.80
  4. Step 4: Simplify right side
    403,220.40x = 198,729,674,106.48
  5. Step 5: Solve for x
    x = 198,729,674,106.48/403,220.40
  6. Step 6: Final answer
    x = 492,856.20

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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.