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Finding the Fourth Proportional to 528,640.92, 729,504.96 and 286,918.31

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Solution

The fourth proportional to 528,640.92, 729,504.96 and 286,918.31 is: 395,936.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,640.92 : 729,504.96 = 286,918.31 : x
  2. Step 2: Convert to fraction form
    528,640.92/729,504.96 = 286,918.31/x
  3. Step 3: Cross multiply
    528,640.92x = 729,504.96 × 286,918.31
  4. Step 4: Simplify right side
    528,640.92x = 209,308,327,088.74
  5. Step 5: Solve for x
    x = 209,308,327,088.74/528,640.92
  6. Step 6: Final answer
    x = 395,936.67

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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.