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Finding the Fourth Proportional to 280,302.71, 420,521.03 and 90,763.28

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Solution

The fourth proportional to 280,302.71, 420,521.03 and 90,763.28 is: 136,166.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,302.71 : 420,521.03 = 90,763.28 : x
  2. Step 2: Convert to fraction form
    280,302.71/420,521.03 = 90,763.28/x
  3. Step 3: Cross multiply
    280,302.71x = 420,521.03 × 90,763.28
  4. Step 4: Simplify right side
    280,302.71x = 38,167,865,435.36
  5. Step 5: Solve for x
    x = 38,167,865,435.36/280,302.71
  6. Step 6: Final answer
    x = 136,166.59

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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.