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Finding the Fourth Proportional to 698,712.40, 964,303.41 and 388,646.29

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Solution

The fourth proportional to 698,712.40, 964,303.41 and 388,646.29 is: 536,376.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,712.40 : 964,303.41 = 388,646.29 : x
  2. Step 2: Convert to fraction form
    698,712.40/964,303.41 = 388,646.29/x
  3. Step 3: Cross multiply
    698,712.40x = 964,303.41 × 388,646.29
  4. Step 4: Simplify right side
    698,712.40x = 374,772,942,730.85
  5. Step 5: Solve for x
    x = 374,772,942,730.85/698,712.40
  6. Step 6: Final answer
    x = 536,376.54

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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.