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Finding the Fourth Proportional to 533,128.30, 735,718.52 and 318,263.74

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Solution

The fourth proportional to 533,128.30, 735,718.52 and 318,263.74 is: 439,204.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    533,128.30 : 735,718.52 = 318,263.74 : x
  2. Step 2: Convert to fraction form
    533,128.30/735,718.52 = 318,263.74/x
  3. Step 3: Cross multiply
    533,128.30x = 735,718.52 × 318,263.74
  4. Step 4: Simplify right side
    533,128.30x = 234,152,526,718.83
  5. Step 5: Solve for x
    x = 234,152,526,718.83/533,128.30
  6. Step 6: Final answer
    x = 439,204.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.