Home / 280,868.40-421,302.60-266,434.20

Finding the Fourth Proportional to 280,868.40, 421,302.60 and 266,434.20

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Solution

The fourth proportional to 280,868.40, 421,302.60 and 266,434.20 is: 399,651.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,868.40 : 421,302.60 = 266,434.20 : x
  2. Step 2: Convert to fraction form
    280,868.40/421,302.60 = 266,434.20/x
  3. Step 3: Cross multiply
    280,868.40x = 421,302.60 × 266,434.20
  4. Step 4: Simplify right side
    280,868.40x = 112,249,421,188.92
  5. Step 5: Solve for x
    x = 112,249,421,188.92/280,868.40
  6. Step 6: Final answer
    x = 399,651.30

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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.