Home / 1,242,000.20-1,863,000.30-389,143.10

Finding the Fourth Proportional to 1,242,000.20, 1,863,000.30 and 389,143.10

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Solution

The fourth proportional to 1,242,000.20, 1,863,000.30 and 389,143.10 is: 583,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,000.20 : 1,863,000.30 = 389,143.10 : x
  2. Step 2: Convert to fraction form
    1,242,000.20/1,863,000.30 = 389,143.10/x
  3. Step 3: Cross multiply
    1,242,000.20x = 1,863,000.30 × 389,143.10
  4. Step 4: Simplify right side
    1,242,000.20x = 724,973,712,042.93
  5. Step 5: Solve for x
    x = 724,973,712,042.93/1,242,000.20
  6. Step 6: Final answer
    x = 583,714.65

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Double scale
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Similar ratio
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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.