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Finding the Fourth Proportional to 654,903.72, 903,630.80 and 382,918.82

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Solution

The fourth proportional to 654,903.72, 903,630.80 and 382,918.82 is: 528,348.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,903.72 : 903,630.80 = 382,918.82 : x
  2. Step 2: Convert to fraction form
    654,903.72/903,630.80 = 382,918.82/x
  3. Step 3: Cross multiply
    654,903.72x = 903,630.80 × 382,918.82
  4. Step 4: Simplify right side
    654,903.72x = 346,017,236,090.80
  5. Step 5: Solve for x
    x = 346,017,236,090.80/654,903.72
  6. Step 6: Final answer
    x = 528,348.25

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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.