Home / 645,678.03-890,795.02-403,868.73

Finding the Fourth Proportional to 645,678.03, 890,795.02 and 403,868.73

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Solution

The fourth proportional to 645,678.03, 890,795.02 and 403,868.73 is: 557,188.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,678.03 : 890,795.02 = 403,868.73 : x
  2. Step 2: Convert to fraction form
    645,678.03/890,795.02 = 403,868.73/x
  3. Step 3: Cross multiply
    645,678.03x = 890,795.02 × 403,868.73
  4. Step 4: Simplify right side
    645,678.03x = 359,764,256,505.79
  5. Step 5: Solve for x
    x = 359,764,256,505.79/645,678.03
  6. Step 6: Final answer
    x = 557,188.32

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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.