Home / 729,209.90-1,005,905.30-427,345.58

Finding the Fourth Proportional to 729,209.90, 1,005,905.30 and 427,345.58

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Solution

The fourth proportional to 729,209.90, 1,005,905.30 and 427,345.58 is: 589,499.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,209.90 : 1,005,905.30 = 427,345.58 : x
  2. Step 2: Convert to fraction form
    729,209.90/1,005,905.30 = 427,345.58/x
  3. Step 3: Cross multiply
    729,209.90x = 1,005,905.30 × 427,345.58
  4. Step 4: Simplify right side
    729,209.90x = 429,869,183,853.57
  5. Step 5: Solve for x
    x = 429,869,183,853.57/729,209.90
  6. Step 6: Final answer
    x = 589,499.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.