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Finding the Fourth Proportional to 518,235.76, 776,763.96 and 315,384.36

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Solution

The fourth proportional to 518,235.76, 776,763.96 and 315,384.36 is: 472,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,235.76 : 776,763.96 = 315,384.36 : x
  2. Step 2: Convert to fraction form
    518,235.76/776,763.96 = 315,384.36/x
  3. Step 3: Cross multiply
    518,235.76x = 776,763.96 × 315,384.36
  4. Step 4: Simplify right side
    518,235.76x = 244,979,204,395.67
  5. Step 5: Solve for x
    x = 244,979,204,395.67/518,235.76
  6. Step 6: Final answer
    x = 472,717.68

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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.