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Finding the Fourth Proportional to 386,985.80, 580,583.90 and 162,228.20

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Solution

The fourth proportional to 386,985.80, 580,583.90 and 162,228.20 is: 243,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,985.80 : 580,583.90 = 162,228.20 : x
  2. Step 2: Convert to fraction form
    386,985.80/580,583.90 = 162,228.20/x
  3. Step 3: Cross multiply
    386,985.80x = 580,583.90 × 162,228.20
  4. Step 4: Simplify right side
    386,985.80x = 94,187,081,045.98
  5. Step 5: Solve for x
    x = 94,187,081,045.98/386,985.80
  6. Step 6: Final answer
    x = 243,386.40

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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.