Home / 648,641.21-972,965.32-425,415.26

Finding the Fourth Proportional to 648,641.21, 972,965.32 and 425,415.26

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Solution

The fourth proportional to 648,641.21, 972,965.32 and 425,415.26 is: 638,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,641.21 : 972,965.32 = 425,415.26 : x
  2. Step 2: Convert to fraction form
    648,641.21/972,965.32 = 425,415.26/x
  3. Step 3: Cross multiply
    648,641.21x = 972,965.32 × 425,415.26
  4. Step 4: Simplify right side
    648,641.21x = 413,914,295,947.66
  5. Step 5: Solve for x
    x = 413,914,295,947.66/648,641.21
  6. Step 6: Final answer
    x = 638,125.20

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Double scale
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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.