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Finding the Fourth Proportional to 398,300.64, 549,647.28 and 217,010.40

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Solution

The fourth proportional to 398,300.64, 549,647.28 and 217,010.40 is: 299,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,300.64 : 549,647.28 = 217,010.40 : x
  2. Step 2: Convert to fraction form
    398,300.64/549,647.28 = 217,010.40/x
  3. Step 3: Cross multiply
    398,300.64x = 549,647.28 × 217,010.40
  4. Step 4: Simplify right side
    398,300.64x = 119,279,176,091.71
  5. Step 5: Solve for x
    x = 119,279,176,091.71/398,300.64
  6. Step 6: Final answer
    x = 299,470.21

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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.