Home / 388,863.40-536,631.37-210,015.40

Finding the Fourth Proportional to 388,863.40, 536,631.37 and 210,015.40

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Solution

The fourth proportional to 388,863.40, 536,631.37 and 210,015.40 is: 289,821.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,863.40 : 536,631.37 = 210,015.40 : x
  2. Step 2: Convert to fraction form
    388,863.40/536,631.37 = 210,015.40/x
  3. Step 3: Cross multiply
    388,863.40x = 536,631.37 × 210,015.40
  4. Step 4: Simplify right side
    388,863.40x = 112,700,851,823.10
  5. Step 5: Solve for x
    x = 112,700,851,823.10/388,863.40
  6. Step 6: Final answer
    x = 289,821.19

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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.