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Finding the Fourth Proportional to 771,955.12, 1,065,339.12 and 427,828.69

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Solution

The fourth proportional to 771,955.12, 1,065,339.12 and 427,828.69 is: 590,426.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,955.12 : 1,065,339.12 = 427,828.69 : x
  2. Step 2: Convert to fraction form
    771,955.12/1,065,339.12 = 427,828.69/x
  3. Step 3: Cross multiply
    771,955.12x = 1,065,339.12 × 427,828.69
  4. Step 4: Simplify right side
    771,955.12x = 455,782,640,115.35
  5. Step 5: Solve for x
    x = 455,782,640,115.35/771,955.12
  6. Step 6: Final answer
    x = 590,426.35

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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.