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Finding the Fourth Proportional to 384,722.47, 577,113.50 and 128,555.93

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Solution

The fourth proportional to 384,722.47, 577,113.50 and 128,555.93 is: 192,843.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,722.47 : 577,113.50 = 128,555.93 : x
  2. Step 2: Convert to fraction form
    384,722.47/577,113.50 = 128,555.93/x
  3. Step 3: Cross multiply
    384,722.47x = 577,113.50 × 128,555.93
  4. Step 4: Simplify right side
    384,722.47x = 74,191,359,179.71
  5. Step 5: Solve for x
    x = 74,191,359,179.71/384,722.47
  6. Step 6: Final answer
    x = 192,843.84

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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.