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Finding the Fourth Proportional to 647,336.19, 893,429.16 and 389,473.77

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Solution

The fourth proportional to 647,336.19, 893,429.16 and 389,473.77 is: 537,537.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,336.19 : 893,429.16 = 389,473.77 : x
  2. Step 2: Convert to fraction form
    647,336.19/893,429.16 = 389,473.77/x
  3. Step 3: Cross multiply
    647,336.19x = 893,429.16 × 389,473.77
  4. Step 4: Simplify right side
    647,336.19x = 347,967,223,173.13
  5. Step 5: Solve for x
    x = 347,967,223,173.13/647,336.19
  6. Step 6: Final answer
    x = 537,537.11

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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.