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Finding the Fourth Proportional to 386,066.60, 579,099.90 and 260,095.40

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Solution

The fourth proportional to 386,066.60, 579,099.90 and 260,095.40 is: 390,143.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,066.60 : 579,099.90 = 260,095.40 : x
  2. Step 2: Convert to fraction form
    386,066.60/579,099.90 = 260,095.40/x
  3. Step 3: Cross multiply
    386,066.60x = 579,099.90 × 260,095.40
  4. Step 4: Simplify right side
    386,066.60x = 150,621,220,130.46
  5. Step 5: Solve for x
    x = 150,621,220,130.46/386,066.60
  6. Step 6: Final answer
    x = 390,143.10

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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.