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Finding the Fourth Proportional to 398,013.59, 549,185.79 and 234,721.32

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Solution

The fourth proportional to 398,013.59, 549,185.79 and 234,721.32 is: 323,872.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,013.59 : 549,185.79 = 234,721.32 : x
  2. Step 2: Convert to fraction form
    398,013.59/549,185.79 = 234,721.32/x
  3. Step 3: Cross multiply
    398,013.59x = 549,185.79 × 234,721.32
  4. Step 4: Simplify right side
    398,013.59x = 128,905,613,554.04
  5. Step 5: Solve for x
    x = 128,905,613,554.04/398,013.59
  6. Step 6: Final answer
    x = 323,872.40

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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.