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Finding the Fourth Proportional to 598,690.80, 896,999.40 and 388,220.40

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Solution

The fourth proportional to 598,690.80, 896,999.40 and 388,220.40 is: 581,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    598,690.80 : 896,999.40 = 388,220.40 : x
  2. Step 2: Convert to fraction form
    598,690.80/896,999.40 = 388,220.40/x
  3. Step 3: Cross multiply
    598,690.80x = 896,999.40 × 388,220.40
  4. Step 4: Simplify right side
    598,690.80x = 348,233,465,867.76
  5. Step 5: Solve for x
    x = 348,233,465,867.76/598,690.80
  6. Step 6: Final answer
    x = 581,658.29

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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.