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Finding the Fourth Proportional to 280,801.99, 387,501.03 and 153,478.50

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Solution

The fourth proportional to 280,801.99, 387,501.03 and 153,478.50 is: 211,797.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,801.99 : 387,501.03 = 153,478.50 : x
  2. Step 2: Convert to fraction form
    280,801.99/387,501.03 = 153,478.50/x
  3. Step 3: Cross multiply
    280,801.99x = 387,501.03 × 153,478.50
  4. Step 4: Simplify right side
    280,801.99x = 59,473,076,832.86
  5. Step 5: Solve for x
    x = 59,473,076,832.86/280,801.99
  6. Step 6: Final answer
    x = 211,797.21

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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.