Home / 390,814,910.39-539,333,947.29-212,206,326.11

Finding the Fourth Proportional to 390,814,910.39, 539,333,947.29 and 212,206,326.11

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Solution

The fourth proportional to 390,814,910.39, 539,333,947.29 and 212,206,326.11 is: 292,849,818.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,814,910.39 : 539,333,947.29 = 212,206,326.11 : x
  2. Step 2: Convert to fraction form
    390,814,910.39/539,333,947.29 = 212,206,326.11/x
  3. Step 3: Cross multiply
    390,814,910.39x = 539,333,947.29 × 212,206,326.11
  4. Step 4: Simplify right side
    390,814,910.39x = 114,450,075,500,815,296
  5. Step 5: Solve for x
    x = 114,450,075,500,815,296/390,814,910.39
  6. Step 6: Final answer
    x = 292,849,818.31

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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.