Home / 398,309,179,251.35-549,668,323,449.77-215,406,280,896.12

Finding the Fourth Proportional to 398,309,179,251.35, 549,668,323,449.77 and 215,406,280,896.12

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Solution

The fourth proportional to 398,309,179,251.35, 549,668,323,449.77 and 215,406,280,896.12 is: 297,261,563,249.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,309,179,251.35 : 549,668,323,449.77 = 215,406,280,896.12 : x
  2. Step 2: Convert to fraction form
    398,309,179,251.35/549,668,323,449.77 = 215,406,280,896.12/x
  3. Step 3: Cross multiply
    398,309,179,251.35x = 549,668,323,449.77 × 215,406,280,896.12
  4. Step 4: Simplify right side
    398,309,179,251.35x = 118,402,009,280,720,509,337,600
  5. Step 5: Solve for x
    x = 118,402,009,280,720,509,337,600/398,309,179,251.35
  6. Step 6: Final answer
    x = 297,261,563,249.10

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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.