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Finding the Fourth Proportional to 280,603.95, 387,227.16 and 153,280.05

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Solution

The fourth proportional to 280,603.95, 387,227.16 and 153,280.05 is: 211,523.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,603.95 : 387,227.16 = 153,280.05 : x
  2. Step 2: Convert to fraction form
    280,603.95/387,227.16 = 153,280.05/x
  3. Step 3: Cross multiply
    280,603.95x = 387,227.16 × 153,280.05
  4. Step 4: Simplify right side
    280,603.95x = 59,354,198,446.16
  5. Step 5: Solve for x
    x = 59,354,198,446.16/280,603.95
  6. Step 6: Final answer
    x = 211,523.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.