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Finding the Fourth Proportional to 390,639.61, 588,887.34 and 364,599.52

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Solution

The fourth proportional to 390,639.61, 588,887.34 and 364,599.52 is: 549,632.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,639.61 : 588,887.34 = 364,599.52 : x
  2. Step 2: Convert to fraction form
    390,639.61/588,887.34 = 364,599.52/x
  3. Step 3: Cross multiply
    390,639.61x = 588,887.34 × 364,599.52
  4. Step 4: Simplify right side
    390,639.61x = 214,708,044,021.97
  5. Step 5: Solve for x
    x = 214,708,044,021.97/390,639.61
  6. Step 6: Final answer
    x = 549,632.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.