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Finding the Fourth Proportional to 386,730.40, 580,095.60 and 360,486.40

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Solution

The fourth proportional to 386,730.40, 580,095.60 and 360,486.40 is: 540,729.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,730.40 : 580,095.60 = 360,486.40 : x
  2. Step 2: Convert to fraction form
    386,730.40/580,095.60 = 360,486.40/x
  3. Step 3: Cross multiply
    386,730.40x = 580,095.60 × 360,486.40
  4. Step 4: Simplify right side
    386,730.40x = 209,116,574,499.84
  5. Step 5: Solve for x
    x = 209,116,574,499.84/386,730.40
  6. Step 6: Final answer
    x = 540,729.60

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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.