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Finding the Fourth Proportional to 612,455.69, 916,887.03 and 429,451.94

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Solution

The fourth proportional to 612,455.69, 916,887.03 and 429,451.94 is: 642,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,455.69 : 916,887.03 = 429,451.94 : x
  2. Step 2: Convert to fraction form
    612,455.69/916,887.03 = 429,451.94/x
  3. Step 3: Cross multiply
    612,455.69x = 916,887.03 × 429,451.94
  4. Step 4: Simplify right side
    612,455.69x = 393,758,911,734.29
  5. Step 5: Solve for x
    x = 393,758,911,734.29/612,455.69
  6. Step 6: Final answer
    x = 642,918.20

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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.