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Finding the Fourth Proportional to 630,438.70, 945,658.05 and 555,643.30

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Solution

The fourth proportional to 630,438.70, 945,658.05 and 555,643.30 is: 833,464.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,438.70 : 945,658.05 = 555,643.30 : x
  2. Step 2: Convert to fraction form
    630,438.70/945,658.05 = 555,643.30/x
  3. Step 3: Cross multiply
    630,438.70x = 945,658.05 × 555,643.30
  4. Step 4: Simplify right side
    630,438.70x = 525,448,559,573.57
  5. Step 5: Solve for x
    x = 525,448,559,573.57/630,438.70
  6. Step 6: Final answer
    x = 833,464.95

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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.