Home / 921,430.87-1,272,222.96-646,373.50

Finding the Fourth Proportional to 921,430.87, 1,272,222.96 and 646,373.50

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Solution

The fourth proportional to 921,430.87, 1,272,222.96 and 646,373.50 is: 892,450.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,430.87 : 1,272,222.96 = 646,373.50 : x
  2. Step 2: Convert to fraction form
    921,430.87/1,272,222.96 = 646,373.50/x
  3. Step 3: Cross multiply
    921,430.87x = 1,272,222.96 × 646,373.50
  4. Step 4: Simplify right side
    921,430.87x = 822,331,207,435.56
  5. Step 5: Solve for x
    x = 822,331,207,435.56/921,430.87
  6. Step 6: Final answer
    x = 892,450.25

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Double scale
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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.