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Finding the Fourth Proportional to 278,501.48, 417,685.01 and 128,597.66

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Solution

The fourth proportional to 278,501.48, 417,685.01 and 128,597.66 is: 192,865.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,501.48 : 417,685.01 = 128,597.66 : x
  2. Step 2: Convert to fraction form
    278,501.48/417,685.01 = 128,597.66/x
  3. Step 3: Cross multiply
    278,501.48x = 417,685.01 × 128,597.66
  4. Step 4: Simplify right side
    278,501.48x = 53,713,314,903.08
  5. Step 5: Solve for x
    x = 53,713,314,903.08/278,501.48
  6. Step 6: Final answer
    x = 192,865.46

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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.