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Finding the Fourth Proportional to 625,381.16, 862,779.47 and 407,843.25

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Solution

The fourth proportional to 625,381.16, 862,779.47 and 407,843.25 is: 562,662.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,381.16 : 862,779.47 = 407,843.25 : x
  2. Step 2: Convert to fraction form
    625,381.16/862,779.47 = 407,843.25/x
  3. Step 3: Cross multiply
    625,381.16x = 862,779.47 × 407,843.25
  4. Step 4: Simplify right side
    625,381.16x = 351,878,781,038.86
  5. Step 5: Solve for x
    x = 351,878,781,038.86/625,381.16
  6. Step 6: Final answer
    x = 562,662.91

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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.