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Finding the Fourth Proportional to 278,300.80, 417,108.80 and 128,332.80

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Solution

The fourth proportional to 278,300.80, 417,108.80 and 128,332.80 is: 192,341.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,300.80 : 417,108.80 = 128,332.80 : x
  2. Step 2: Convert to fraction form
    278,300.80/417,108.80 = 128,332.80/x
  3. Step 3: Cross multiply
    278,300.80x = 417,108.80 × 128,332.80
  4. Step 4: Simplify right side
    278,300.80x = 53,528,740,208.64
  5. Step 5: Solve for x
    x = 53,528,740,208.64/278,300.80
  6. Step 6: Final answer
    x = 192,341.31

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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.