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Finding the Fourth Proportional to 398,345.36, 549,709.47 and 217,058.86

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Solution

The fourth proportional to 398,345.36, 549,709.47 and 217,058.86 is: 299,537.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,345.36 : 549,709.47 = 217,058.86 : x
  2. Step 2: Convert to fraction form
    398,345.36/549,709.47 = 217,058.86/x
  3. Step 3: Cross multiply
    398,345.36x = 549,709.47 × 217,058.86
  4. Step 4: Simplify right side
    398,345.36x = 119,319,310,889.40
  5. Step 5: Solve for x
    x = 119,319,310,889.40/398,345.36
  6. Step 6: Final answer
    x = 299,537.34

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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.