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Finding the Fourth Proportional to 423,710.65, 634,975.48 and 318,406.60

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Solution

The fourth proportional to 423,710.65, 634,975.48 and 318,406.60 is: 477,166.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,710.65 : 634,975.48 = 318,406.60 : x
  2. Step 2: Convert to fraction form
    423,710.65/634,975.48 = 318,406.60/x
  3. Step 3: Cross multiply
    423,710.65x = 634,975.48 × 318,406.60
  4. Step 4: Simplify right side
    423,710.65x = 202,180,383,670.17
  5. Step 5: Solve for x
    x = 202,180,383,670.17/423,710.65
  6. Step 6: Final answer
    x = 477,166.16

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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.