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Finding the Fourth Proportional to 386,420.40, 579,630.60 and 176,468.40

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Solution

The fourth proportional to 386,420.40, 579,630.60 and 176,468.40 is: 264,702.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,420.40 : 579,630.60 = 176,468.40 : x
  2. Step 2: Convert to fraction form
    386,420.40/579,630.60 = 176,468.40/x
  3. Step 3: Cross multiply
    386,420.40x = 579,630.60 × 176,468.40
  4. Step 4: Simplify right side
    386,420.40x = 102,286,484,573.04
  5. Step 5: Solve for x
    x = 102,286,484,573.04/386,420.40
  6. Step 6: Final answer
    x = 264,702.60

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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.