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Finding the Fourth Proportional to 280,241.40, 420,428.81 and 90,701.77

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Solution

The fourth proportional to 280,241.40, 420,428.81 and 90,701.77 is: 136,074.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,241.40 : 420,428.81 = 90,701.77 : x
  2. Step 2: Convert to fraction form
    280,241.40/420,428.81 = 90,701.77/x
  3. Step 3: Cross multiply
    280,241.40x = 420,428.81 × 90,701.77
  4. Step 4: Simplify right side
    280,241.40x = 38,133,637,225.99
  5. Step 5: Solve for x
    x = 38,133,637,225.99/280,241.40
  6. Step 6: Final answer
    x = 136,074.25

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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.