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Finding the Fourth Proportional to 657,607.85, 907,240.62 and 381,918.77

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Solution

The fourth proportional to 657,607.85, 907,240.62 and 381,918.77 is: 526,897.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,607.85 : 907,240.62 = 381,918.77 : x
  2. Step 2: Convert to fraction form
    657,607.85/907,240.62 = 381,918.77/x
  3. Step 3: Cross multiply
    657,607.85x = 907,240.62 × 381,918.77
  4. Step 4: Simplify right side
    657,607.85x = 346,492,221,684.44
  5. Step 5: Solve for x
    x = 346,492,221,684.44/657,607.85
  6. Step 6: Final answer
    x = 526,897.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.