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Finding the Fourth Proportional to 280,303.71, 420,522.53 and 90,764.28

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Solution

The fourth proportional to 280,303.71, 420,522.53 and 90,764.28 is: 136,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,303.71 : 420,522.53 = 90,764.28 : x
  2. Step 2: Convert to fraction form
    280,303.71/420,522.53 = 90,764.28/x
  3. Step 3: Cross multiply
    280,303.71x = 420,522.53 × 90,764.28
  4. Step 4: Simplify right side
    280,303.71x = 38,168,424,659.23
  5. Step 5: Solve for x
    x = 38,168,424,659.23/280,303.71
  6. Step 6: Final answer
    x = 136,168.10

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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.