Home / 307,311.28-423,124.53-261,280.40

Finding the Fourth Proportional to 307,311.28, 423,124.53 and 261,280.40

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Solution

The fourth proportional to 307,311.28, 423,124.53 and 261,280.40 is: 359,746.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,311.28 : 423,124.53 = 261,280.40 : x
  2. Step 2: Convert to fraction form
    307,311.28/423,124.53 = 261,280.40/x
  3. Step 3: Cross multiply
    307,311.28x = 423,124.53 × 261,280.40
  4. Step 4: Simplify right side
    307,311.28x = 110,554,144,498.95
  5. Step 5: Solve for x
    x = 110,554,144,498.95/307,311.28
  6. Step 6: Final answer
    x = 359,746.46

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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.