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Finding the Fourth Proportional to 398,289.93, 549,637.07 and 217,001.31

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Solution

The fourth proportional to 398,289.93, 549,637.07 and 217,001.31 is: 299,460.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,289.93 : 549,637.07 = 217,001.31 : x
  2. Step 2: Convert to fraction form
    398,289.93/549,637.07 = 217,001.31/x
  3. Step 3: Cross multiply
    398,289.93x = 549,637.07 × 217,001.31
  4. Step 4: Simplify right side
    398,289.93x = 119,271,963,129.56
  5. Step 5: Solve for x
    x = 119,271,963,129.56/398,289.93
  6. Step 6: Final answer
    x = 299,460.15

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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.