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Finding the Fourth Proportional to 882,820.75, 1,218,423.86 and 520,128.67

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Solution

The fourth proportional to 882,820.75, 1,218,423.86 and 520,128.67 is: 717,854.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    882,820.75 : 1,218,423.86 = 520,128.67 : x
  2. Step 2: Convert to fraction form
    882,820.75/1,218,423.86 = 520,128.67/x
  3. Step 3: Cross multiply
    882,820.75x = 1,218,423.86 × 520,128.67
  4. Step 4: Simplify right side
    882,820.75x = 633,737,181,798.07
  5. Step 5: Solve for x
    x = 633,737,181,798.07/882,820.75
  6. Step 6: Final answer
    x = 717,854.88

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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.