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Finding the Fourth Proportional to 398,312.10, 549,663.80 and 217,025.51

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Solution

The fourth proportional to 398,312.10, 549,663.80 and 217,025.51 is: 299,491.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,312.10 : 549,663.80 = 217,025.51 : x
  2. Step 2: Convert to fraction form
    398,312.10/549,663.80 = 217,025.51/x
  3. Step 3: Cross multiply
    398,312.10x = 549,663.80 × 217,025.51
  4. Step 4: Simplify right side
    398,312.10x = 119,291,062,690.09
  5. Step 5: Solve for x
    x = 119,291,062,690.09/398,312.10
  6. Step 6: Final answer
    x = 299,491.44

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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.