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Finding the Fourth Proportional to 280,603.20, 387,240.72 and 153,280.88

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Solution

The fourth proportional to 280,603.20, 387,240.72 and 153,280.88 is: 211,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,603.20 : 387,240.72 = 153,280.88 : x
  2. Step 2: Convert to fraction form
    280,603.20/387,240.72 = 153,280.88/x
  3. Step 3: Cross multiply
    280,603.20x = 387,240.72 × 153,280.88
  4. Step 4: Simplify right side
    280,603.20x = 59,356,598,333.43
  5. Step 5: Solve for x
    x = 59,356,598,333.43/280,603.20
  6. Step 6: Final answer
    x = 211,532.15

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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.