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Finding the Fourth Proportional to 398,070.39, 549,312.26 and 219,222.39

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Solution

The fourth proportional to 398,070.39, 549,312.26 and 219,222.39 is: 302,513.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,070.39 : 549,312.26 = 219,222.39 : x
  2. Step 2: Convert to fraction form
    398,070.39/549,312.26 = 219,222.39/x
  3. Step 3: Cross multiply
    398,070.39x = 549,312.26 × 219,222.39
  4. Step 4: Simplify right side
    398,070.39x = 120,421,545,397.39
  5. Step 5: Solve for x
    x = 120,421,545,397.39/398,070.39
  6. Step 6: Final answer
    x = 302,513.19

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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.