Home / 921,499.64-1,381,330.91-440,840.78

Finding the Fourth Proportional to 921,499.64, 1,381,330.91 and 440,840.78

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Solution

The fourth proportional to 921,499.64, 1,381,330.91 and 440,840.78 is: 660,821.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,499.64 : 1,381,330.91 = 440,840.78 : x
  2. Step 2: Convert to fraction form
    921,499.64/1,381,330.91 = 440,840.78/x
  3. Step 3: Cross multiply
    921,499.64x = 1,381,330.91 × 440,840.78
  4. Step 4: Simplify right side
    921,499.64x = 608,946,995,802.51
  5. Step 5: Solve for x
    x = 608,946,995,802.51/921,499.64
  6. Step 6: Final answer
    x = 660,821.74

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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.