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Finding the Fourth Proportional to 386,509.60, 579,764.40 and 260,538.40

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Solution

The fourth proportional to 386,509.60, 579,764.40 and 260,538.40 is: 390,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,509.60 : 579,764.40 = 260,538.40 : x
  2. Step 2: Convert to fraction form
    386,509.60/579,764.40 = 260,538.40/x
  3. Step 3: Cross multiply
    386,509.60x = 579,764.40 × 260,538.40
  4. Step 4: Simplify right side
    386,509.60x = 151,050,889,152.96
  5. Step 5: Solve for x
    x = 151,050,889,152.96/386,509.60
  6. Step 6: Final answer
    x = 390,807.60

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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.