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Finding the Fourth Proportional to 280,583.70, 420,875.55 and 70,221.30

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Solution

The fourth proportional to 280,583.70, 420,875.55 and 70,221.30 is: 105,331.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,583.70 : 420,875.55 = 70,221.30 : x
  2. Step 2: Convert to fraction form
    280,583.70/420,875.55 = 70,221.30/x
  3. Step 3: Cross multiply
    280,583.70x = 420,875.55 × 70,221.30
  4. Step 4: Simplify right side
    280,583.70x = 29,554,428,259.22
  5. Step 5: Solve for x
    x = 29,554,428,259.22/280,583.70
  6. Step 6: Final answer
    x = 105,331.95

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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.