Home / 398,051,689.30-549,312,995.65-219,431,656.64

Finding the Fourth Proportional to 398,051,689.30, 549,312,995.65 and 219,431,656.64

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Solution

The fourth proportional to 398,051,689.30, 549,312,995.65 and 219,431,656.64 is: 302,816,603.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,051,689.30 : 549,312,995.65 = 219,431,656.64 : x
  2. Step 2: Convert to fraction form
    398,051,689.30/549,312,995.65 = 219,431,656.64/x
  3. Step 3: Cross multiply
    398,051,689.30x = 549,312,995.65 × 219,431,656.64
  4. Step 4: Simplify right side
    398,051,689.30x = 120,536,660,646,120,688
  5. Step 5: Solve for x
    x = 120,536,660,646,120,688/398,051,689.30
  6. Step 6: Final answer
    x = 302,816,603.69

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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.