Home / 261,640.20-392,460.30-258,875.40

Finding the Fourth Proportional to 261,640.20, 392,460.30 and 258,875.40

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Solution

The fourth proportional to 261,640.20, 392,460.30 and 258,875.40 is: 388,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,640.20 : 392,460.30 = 258,875.40 : x
  2. Step 2: Convert to fraction form
    261,640.20/392,460.30 = 258,875.40/x
  3. Step 3: Cross multiply
    261,640.20x = 392,460.30 × 258,875.40
  4. Step 4: Simplify right side
    261,640.20x = 101,598,317,146.62
  5. Step 5: Solve for x
    x = 101,598,317,146.62/261,640.20
  6. Step 6: Final answer
    x = 388,313.10

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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.