Home / 421,539,343.79-581,785,142.95-242,889,016.39

Finding the Fourth Proportional to 421,539,343.79, 581,785,142.95 and 242,889,016.39

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Solution

The fourth proportional to 421,539,343.79, 581,785,142.95 and 242,889,016.39 is: 335,221,903.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,539,343.79 : 581,785,142.95 = 242,889,016.39 : x
  2. Step 2: Convert to fraction form
    421,539,343.79/581,785,142.95 = 242,889,016.39/x
  3. Step 3: Cross multiply
    421,539,343.79x = 581,785,142.95 × 242,889,016.39
  4. Step 4: Simplify right side
    421,539,343.79x = 141,309,221,124,009,152
  5. Step 5: Solve for x
    x = 141,309,221,124,009,152/421,539,343.79
  6. Step 6: Final answer
    x = 335,221,903.26

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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.