Home / 390,814,555.72-539,333,457.08-212,205,972.06

Finding the Fourth Proportional to 390,814,555.72, 539,333,457.08 and 212,205,972.06

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Solution

The fourth proportional to 390,814,555.72, 539,333,457.08 and 212,205,972.06 is: 292,849,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,814,555.72 : 539,333,457.08 = 212,205,972.06 : x
  2. Step 2: Convert to fraction form
    390,814,555.72/539,333,457.08 = 212,205,972.06/x
  3. Step 3: Cross multiply
    390,814,555.72x = 539,333,457.08 × 212,205,972.06
  4. Step 4: Simplify right side
    390,814,555.72x = 114,449,780,524,141,696
  5. Step 5: Solve for x
    x = 114,449,780,524,141,696/390,814,555.72
  6. Step 6: Final answer
    x = 292,849,329.30

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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.