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Finding the Fourth Proportional to 398,289.02, 597,492.47 and 128,326.68

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Solution

The fourth proportional to 398,289.02, 597,492.47 and 128,326.68 is: 192,509.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,289.02 : 597,492.47 = 128,326.68 : x
  2. Step 2: Convert to fraction form
    398,289.02/597,492.47 = 128,326.68/x
  3. Step 3: Cross multiply
    398,289.02x = 597,492.47 × 128,326.68
  4. Step 4: Simplify right side
    398,289.02x = 76,674,225,320.92
  5. Step 5: Solve for x
    x = 76,674,225,320.92/398,289.02
  6. Step 6: Final answer
    x = 192,509.01

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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.