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Finding the Fourth Proportional to 587,752.40, 879,785.40 and 421,864.40

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Solution

The fourth proportional to 587,752.40, 879,785.40 and 421,864.40 is: 631,473.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,752.40 : 879,785.40 = 421,864.40 : x
  2. Step 2: Convert to fraction form
    587,752.40/879,785.40 = 421,864.40/x
  3. Step 3: Cross multiply
    587,752.40x = 879,785.40 × 421,864.40
  4. Step 4: Simplify right side
    587,752.40x = 371,150,139,899.76
  5. Step 5: Solve for x
    x = 371,150,139,899.76/587,752.40
  6. Step 6: Final answer
    x = 631,473.63

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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.