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Finding the Fourth Proportional to 280,303.59, 420,440.33 and 138,007.01

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Solution

The fourth proportional to 280,303.59, 420,440.33 and 138,007.01 is: 207,003.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,303.59 : 420,440.33 = 138,007.01 : x
  2. Step 2: Convert to fraction form
    280,303.59/420,440.33 = 138,007.01/x
  3. Step 3: Cross multiply
    280,303.59x = 420,440.33 × 138,007.01
  4. Step 4: Simplify right side
    280,303.59x = 58,023,710,034.48
  5. Step 5: Solve for x
    x = 58,023,710,034.48/280,303.59
  6. Step 6: Final answer
    x = 207,003.09

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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.