Home / 388,107.24-535,411-280,506.84

Finding the Fourth Proportional to 388,107.24, 535,411 and 280,506.84

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Solution

The fourth proportional to 388,107.24, 535,411 and 280,506.84 is: 386,971.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,107.24 : 535,411 = 280,506.84 : x
  2. Step 2: Convert to fraction form
    388,107.24/535,411 = 280,506.84/x
  3. Step 3: Cross multiply
    388,107.24x = 535,411 × 280,506.84
  4. Step 4: Simplify right side
    388,107.24x = 150,186,447,711.24
  5. Step 5: Solve for x
    x = 150,186,447,711.24/388,107.24
  6. Step 6: Final answer
    x = 386,971.52

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1.5x scale

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.