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Finding the Fourth Proportional to 388,870.40, 536,641.04 and 210,022.40

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Solution

The fourth proportional to 388,870.40, 536,641.04 and 210,022.40 is: 289,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,870.40 : 536,641.04 = 210,022.40 : x
  2. Step 2: Convert to fraction form
    388,870.40/536,641.04 = 210,022.40/x
  3. Step 3: Cross multiply
    388,870.40x = 536,641.04 × 210,022.40
  4. Step 4: Simplify right side
    388,870.40x = 112,706,639,159.30
  5. Step 5: Solve for x
    x = 112,706,639,159.30/388,870.40
  6. Step 6: Final answer
    x = 289,830.85

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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.