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Finding the Fourth Proportional to 398,518.74, 549,947.07 and 217,223.70

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Solution

The fourth proportional to 398,518.74, 549,947.07 and 217,223.70 is: 299,763.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,518.74 : 549,947.07 = 217,223.70 : x
  2. Step 2: Convert to fraction form
    398,518.74/549,947.07 = 217,223.70/x
  3. Step 3: Cross multiply
    398,518.74x = 549,947.07 × 217,223.70
  4. Step 4: Simplify right side
    398,518.74x = 119,461,537,349.56
  5. Step 5: Solve for x
    x = 119,461,537,349.56/398,518.74
  6. Step 6: Final answer
    x = 299,763.91

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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.