Home / 387,686,711.80-535,011,076.71-211,475,490.83

Finding the Fourth Proportional to 387,686,711.80, 535,011,076.71 and 211,475,490.83

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Solution

The fourth proportional to 387,686,711.80, 535,011,076.71 and 211,475,490.83 is: 291,838,039.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,686,711.80 : 535,011,076.71 = 211,475,490.83 : x
  2. Step 2: Convert to fraction form
    387,686,711.80/535,011,076.71 = 211,475,490.83/x
  3. Step 3: Cross multiply
    387,686,711.80x = 535,011,076.71 × 211,475,490.83
  4. Step 4: Simplify right side
    387,686,711.80x = 113,141,730,046,734,032
  5. Step 5: Solve for x
    x = 113,141,730,046,734,032/387,686,711.80
  6. Step 6: Final answer
    x = 291,838,039.85

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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.