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Finding the Fourth Proportional to 518,279.18, 715,014.59 and 343,931.60

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Solution

The fourth proportional to 518,279.18, 715,014.59 and 343,931.60 is: 474,485.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,279.18 : 715,014.59 = 343,931.60 : x
  2. Step 2: Convert to fraction form
    518,279.18/715,014.59 = 343,931.60/x
  3. Step 3: Cross multiply
    518,279.18x = 715,014.59 × 343,931.60
  4. Step 4: Simplify right side
    518,279.18x = 245,916,112,029.92
  5. Step 5: Solve for x
    x = 245,916,112,029.92/518,279.18
  6. Step 6: Final answer
    x = 474,485.81

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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.