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Finding the Fourth Proportional to 606,127.40, 911,159.40 and 429,855.20

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Solution

The fourth proportional to 606,127.40, 911,159.40 and 429,855.20 is: 646,178.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,127.40 : 911,159.40 = 429,855.20 : x
  2. Step 2: Convert to fraction form
    606,127.40/911,159.40 = 429,855.20/x
  3. Step 3: Cross multiply
    606,127.40x = 911,159.40 × 429,855.20
  4. Step 4: Simplify right side
    606,127.40x = 391,666,606,118.88
  5. Step 5: Solve for x
    x = 391,666,606,118.88/606,127.40
  6. Step 6: Final answer
    x = 646,178.68

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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.