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Finding the Fourth Proportional to 612,951.59, 845,393.91 and 398,160.86

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Solution

The fourth proportional to 612,951.59, 845,393.91 and 398,160.86 is: 549,150.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,951.59 : 845,393.91 = 398,160.86 : x
  2. Step 2: Convert to fraction form
    612,951.59/845,393.91 = 398,160.86/x
  3. Step 3: Cross multiply
    612,951.59x = 845,393.91 × 398,160.86
  4. Step 4: Simplify right side
    612,951.59x = 336,602,762,017.39
  5. Step 5: Solve for x
    x = 336,602,762,017.39/612,951.59
  6. Step 6: Final answer
    x = 549,150.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.