Home / 261,623.20-392,434.80-258,858.40

Finding the Fourth Proportional to 261,623.20, 392,434.80 and 258,858.40

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Solution

The fourth proportional to 261,623.20, 392,434.80 and 258,858.40 is: 388,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,623.20 : 392,434.80 = 258,858.40 : x
  2. Step 2: Convert to fraction form
    261,623.20/392,434.80 = 258,858.40/x
  3. Step 3: Cross multiply
    261,623.20x = 392,434.80 × 258,858.40
  4. Step 4: Simplify right side
    261,623.20x = 101,585,044,432.32
  5. Step 5: Solve for x
    x = 101,585,044,432.32/261,623.20
  6. Step 6: Final answer
    x = 388,287.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.