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Finding the Fourth Proportional to 638,055.40, 956,852.70 and 322,407.40

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Solution

The fourth proportional to 638,055.40, 956,852.70 and 322,407.40 is: 483,494.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,055.40 : 956,852.70 = 322,407.40 : x
  2. Step 2: Convert to fraction form
    638,055.40/956,852.70 = 322,407.40/x
  3. Step 3: Cross multiply
    638,055.40x = 956,852.70 × 322,407.40
  4. Step 4: Simplify right side
    638,055.40x = 308,496,391,189.98
  5. Step 5: Solve for x
    x = 308,496,391,189.98/638,055.40
  6. Step 6: Final answer
    x = 483,494.68

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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.