Home / 390,704.23-586,056.34-257,553.35

Finding the Fourth Proportional to 390,704.23, 586,056.34 and 257,553.35

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Solution

The fourth proportional to 390,704.23, 586,056.34 and 257,553.35 is: 386,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,704.23 : 586,056.34 = 257,553.35 : x
  2. Step 2: Convert to fraction form
    390,704.23/586,056.34 = 257,553.35/x
  3. Step 3: Cross multiply
    390,704.23x = 586,056.34 × 257,553.35
  4. Step 4: Simplify right side
    390,704.23x = 150,940,773,655.74
  5. Step 5: Solve for x
    x = 150,940,773,655.74/390,704.23
  6. Step 6: Final answer
    x = 386,330.02

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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.