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Finding the Fourth Proportional to 691,053.94, 953,617.65 and 389,228.50

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Solution

The fourth proportional to 691,053.94, 953,617.65 and 389,228.50 is: 537,114.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,053.94 : 953,617.65 = 389,228.50 : x
  2. Step 2: Convert to fraction form
    691,053.94/953,617.65 = 389,228.50/x
  3. Step 3: Cross multiply
    691,053.94x = 953,617.65 × 389,228.50
  4. Step 4: Simplify right side
    691,053.94x = 371,175,167,483.03
  5. Step 5: Solve for x
    x = 371,175,167,483.03/691,053.94
  6. Step 6: Final answer
    x = 537,114.61

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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.