Home / 928,000.80-1,392,001.20-644,565.60

Finding the Fourth Proportional to 928,000.80, 1,392,001.20 and 644,565.60

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Solution

The fourth proportional to 928,000.80, 1,392,001.20 and 644,565.60 is: 966,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,000.80 : 1,392,001.20 = 644,565.60 : x
  2. Step 2: Convert to fraction form
    928,000.80/1,392,001.20 = 644,565.60/x
  3. Step 3: Cross multiply
    928,000.80x = 1,392,001.20 × 644,565.60
  4. Step 4: Simplify right side
    928,000.80x = 897,236,088,678.72
  5. Step 5: Solve for x
    x = 897,236,088,678.72/928,000.80
  6. Step 6: Final answer
    x = 966,848.40

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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.