Home / 287,330.72-396,501.12-164,816.78

Finding the Fourth Proportional to 287,330.72, 396,501.12 and 164,816.78

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Solution

The fourth proportional to 287,330.72, 396,501.12 and 164,816.78 is: 227,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,330.72 : 396,501.12 = 164,816.78 : x
  2. Step 2: Convert to fraction form
    287,330.72/396,501.12 = 164,816.78/x
  3. Step 3: Cross multiply
    287,330.72x = 396,501.12 × 164,816.78
  4. Step 4: Simplify right side
    287,330.72x = 65,350,037,864.79
  5. Step 5: Solve for x
    x = 65,350,037,864.79/287,330.72
  6. Step 6: Final answer
    x = 227,438.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.