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Finding the Fourth Proportional to 280,295.88, 420,510.79 and 90,756.45

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Solution

The fourth proportional to 280,295.88, 420,510.79 and 90,756.45 is: 136,156.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,295.88 : 420,510.79 = 90,756.45 : x
  2. Step 2: Convert to fraction form
    280,295.88/420,510.79 = 90,756.45/x
  3. Step 3: Cross multiply
    280,295.88x = 420,510.79 × 90,756.45
  4. Step 4: Simplify right side
    280,295.88x = 38,164,064,384.54
  5. Step 5: Solve for x
    x = 38,164,064,384.54/280,295.88
  6. Step 6: Final answer
    x = 136,156.35

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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.