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Finding the Fourth Proportional to 355,128.10, 532,692.15 and 299,140.90

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Solution

The fourth proportional to 355,128.10, 532,692.15 and 299,140.90 is: 448,711.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,128.10 : 532,692.15 = 299,140.90 : x
  2. Step 2: Convert to fraction form
    355,128.10/532,692.15 = 299,140.90/x
  3. Step 3: Cross multiply
    355,128.10x = 532,692.15 × 299,140.90
  4. Step 4: Simplify right side
    355,128.10x = 159,350,009,173.94
  5. Step 5: Solve for x
    x = 159,350,009,173.94/355,128.10
  6. Step 6: Final answer
    x = 448,711.35

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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.