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Finding the Fourth Proportional to 389,000.70, 583,501.05 and 386,543.10

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Solution

The fourth proportional to 389,000.70, 583,501.05 and 386,543.10 is: 579,814.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,000.70 : 583,501.05 = 386,543.10 : x
  2. Step 2: Convert to fraction form
    389,000.70/583,501.05 = 386,543.10/x
  3. Step 3: Cross multiply
    389,000.70x = 583,501.05 × 386,543.10
  4. Step 4: Simplify right side
    389,000.70x = 225,548,304,720.26
  5. Step 5: Solve for x
    x = 225,548,304,720.26/389,000.70
  6. Step 6: Final answer
    x = 579,814.65

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Similar ratio
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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.