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Finding the Fourth Proportional to 368,143.80, 551,891.70 and 249,430.20

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Solution

The fourth proportional to 368,143.80, 551,891.70 and 249,430.20 is: 373,925.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,143.80 : 551,891.70 = 249,430.20 : x
  2. Step 2: Convert to fraction form
    368,143.80/551,891.70 = 249,430.20/x
  3. Step 3: Cross multiply
    368,143.80x = 551,891.70 × 249,430.20
  4. Step 4: Simplify right side
    368,143.80x = 137,658,457,109.34
  5. Step 5: Solve for x
    x = 137,658,457,109.34/368,143.80
  6. Step 6: Final answer
    x = 373,925.78

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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.