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Finding the Fourth Proportional to 606,894.72, 909,604.80 and 429,453.60

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Solution

The fourth proportional to 606,894.72, 909,604.80 and 429,453.60 is: 643,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,894.72 : 909,604.80 = 429,453.60 : x
  2. Step 2: Convert to fraction form
    606,894.72/909,604.80 = 429,453.60/x
  3. Step 3: Cross multiply
    606,894.72x = 909,604.80 × 429,453.60
  4. Step 4: Simplify right side
    606,894.72x = 390,633,055,937.28
  5. Step 5: Solve for x
    x = 390,633,055,937.28/606,894.72
  6. Step 6: Final answer
    x = 643,658.68

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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.