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Finding the Fourth Proportional to 478,870.32, 718,585.36 and 265,817.64

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Solution

The fourth proportional to 478,870.32, 718,585.36 and 265,817.64 is: 398,881.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,870.32 : 718,585.36 = 265,817.64 : x
  2. Step 2: Convert to fraction form
    478,870.32/718,585.36 = 265,817.64/x
  3. Step 3: Cross multiply
    478,870.32x = 718,585.36 × 265,817.64
  4. Step 4: Simplify right side
    478,870.32x = 191,012,664,533.75
  5. Step 5: Solve for x
    x = 191,012,664,533.75/478,870.32
  6. Step 6: Final answer
    x = 398,881.82

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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.