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Finding the Fourth Proportional to 578,432.34, 866,518.54 and 398,485.98

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Solution

The fourth proportional to 578,432.34, 866,518.54 and 398,485.98 is: 596,950.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,432.34 : 866,518.54 = 398,485.98 : x
  2. Step 2: Convert to fraction form
    578,432.34/866,518.54 = 398,485.98/x
  3. Step 3: Cross multiply
    578,432.34x = 866,518.54 × 398,485.98
  4. Step 4: Simplify right side
    578,432.34x = 345,295,489,600.07
  5. Step 5: Solve for x
    x = 345,295,489,600.07/578,432.34
  6. Step 6: Final answer
    x = 596,950.53

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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.