Home / 398,430.23-549,817.65-217,138.25

Finding the Fourth Proportional to 398,430.23, 549,817.65 and 217,138.25

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Solution

The fourth proportional to 398,430.23, 549,817.65 and 217,138.25 is: 299,642.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,430.23 : 549,817.65 = 217,138.25 : x
  2. Step 2: Convert to fraction form
    398,430.23/549,817.65 = 217,138.25/x
  3. Step 3: Cross multiply
    398,430.23x = 549,817.65 × 217,138.25
  4. Step 4: Simplify right side
    398,430.23x = 119,386,439,591.02
  5. Step 5: Solve for x
    x = 119,386,439,591.02/398,430.23
  6. Step 6: Final answer
    x = 299,642.03

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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.