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Finding the Fourth Proportional to 518,684.64, 715,841.76 and 300,941.28

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Solution

The fourth proportional to 518,684.64, 715,841.76 and 300,941.28 is: 415,332.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,684.64 : 715,841.76 = 300,941.28 : x
  2. Step 2: Convert to fraction form
    518,684.64/715,841.76 = 300,941.28/x
  3. Step 3: Cross multiply
    518,684.64x = 715,841.76 × 300,941.28
  4. Step 4: Simplify right side
    518,684.64x = 215,426,335,531.85
  5. Step 5: Solve for x
    x = 215,426,335,531.85/518,684.64
  6. Step 6: Final answer
    x = 415,332.01

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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.