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Finding the Fourth Proportional to 518,305.08, 715,244.94 and 291,945.72

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Solution

The fourth proportional to 518,305.08, 715,244.94 and 291,945.72 is: 402,876.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,305.08 : 715,244.94 = 291,945.72 : x
  2. Step 2: Convert to fraction form
    518,305.08/715,244.94 = 291,945.72/x
  3. Step 3: Cross multiply
    518,305.08x = 715,244.94 × 291,945.72
  4. Step 4: Simplify right side
    518,305.08x = 208,812,698,984.66
  5. Step 5: Solve for x
    x = 208,812,698,984.66/518,305.08
  6. Step 6: Final answer
    x = 402,876.04

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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.