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Finding the Fourth Proportional to 385,624.64, 577,683.66 and 265,660.40

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Solution

The fourth proportional to 385,624.64, 577,683.66 and 265,660.40 is: 397,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,624.64 : 577,683.66 = 265,660.40 : x
  2. Step 2: Convert to fraction form
    385,624.64/577,683.66 = 265,660.40/x
  3. Step 3: Cross multiply
    385,624.64x = 577,683.66 × 265,660.40
  4. Step 4: Simplify right side
    385,624.64x = 153,467,672,189.06
  5. Step 5: Solve for x
    x = 153,467,672,189.06/385,624.64
  6. Step 6: Final answer
    x = 397,971.64

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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.