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Finding the Fourth Proportional to 611,425.09, 916,841.38 and 256,343.77

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Solution

The fourth proportional to 611,425.09, 916,841.38 and 256,343.77 is: 384,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,425.09 : 916,841.38 = 256,343.77 : x
  2. Step 2: Convert to fraction form
    611,425.09/916,841.38 = 256,343.77/x
  3. Step 3: Cross multiply
    611,425.09x = 916,841.38 × 256,343.77
  4. Step 4: Simplify right side
    611,425.09x = 235,026,575,841.20
  5. Step 5: Solve for x
    x = 235,026,575,841.20/611,425.09
  6. Step 6: Final answer
    x = 384,391.45

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1.5x scale

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.