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Finding the Fourth Proportional to 471,130.40, 705,658.80 and 418,599.20

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Solution

The fourth proportional to 471,130.40, 705,658.80 and 418,599.20 is: 626,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,130.40 : 705,658.80 = 418,599.20 : x
  2. Step 2: Convert to fraction form
    471,130.40/705,658.80 = 418,599.20/x
  3. Step 3: Cross multiply
    471,130.40x = 705,658.80 × 418,599.20
  4. Step 4: Simplify right side
    471,130.40x = 295,388,209,152.96
  5. Step 5: Solve for x
    x = 295,388,209,152.96/471,130.40
  6. Step 6: Final answer
    x = 626,977.60

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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.