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Finding the Fourth Proportional to 771,571.64, 1,064,785.90 and 440,420.76

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Solution

The fourth proportional to 771,571.64, 1,064,785.90 and 440,420.76 is: 607,790.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,571.64 : 1,064,785.90 = 440,420.76 : x
  2. Step 2: Convert to fraction form
    771,571.64/1,064,785.90 = 440,420.76/x
  3. Step 3: Cross multiply
    771,571.64x = 1,064,785.90 × 440,420.76
  4. Step 4: Simplify right side
    771,571.64x = 468,953,815,315.28
  5. Step 5: Solve for x
    x = 468,953,815,315.28/771,571.64
  6. Step 6: Final answer
    x = 607,790.37

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Half scale
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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.