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Finding the Fourth Proportional to 398,813.60, 598,220.40 and 249,222.80

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Solution

The fourth proportional to 398,813.60, 598,220.40 and 249,222.80 is: 373,834.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,813.60 : 598,220.40 = 249,222.80 : x
  2. Step 2: Convert to fraction form
    398,813.60/598,220.40 = 249,222.80/x
  3. Step 3: Cross multiply
    398,813.60x = 598,220.40 × 249,222.80
  4. Step 4: Simplify right side
    398,813.60x = 149,090,163,105.12
  5. Step 5: Solve for x
    x = 149,090,163,105.12/398,813.60
  6. Step 6: Final answer
    x = 373,834.20

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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.