Home / 398,309,175,039.69-549,668,317,631.76-215,406,276,676.47

Finding the Fourth Proportional to 398,309,175,039.69, 549,668,317,631.76 and 215,406,276,676.47

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Solution

The fourth proportional to 398,309,175,039.69, 549,668,317,631.76 and 215,406,276,676.47 is: 297,261,557,422.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,309,175,039.69 : 549,668,317,631.76 = 215,406,276,676.47 : x
  2. Step 2: Convert to fraction form
    398,309,175,039.69/549,668,317,631.76 = 215,406,276,676.47/x
  3. Step 3: Cross multiply
    398,309,175,039.69x = 549,668,317,631.76 × 215,406,276,676.47
  4. Step 4: Simplify right side
    398,309,175,039.69x = 118,402,005,708,076,685,983,744
  5. Step 5: Solve for x
    x = 118,402,005,708,076,685,983,744/398,309,175,039.69
  6. Step 6: Final answer
    x = 297,261,557,422.77

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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.