Home / 387,686,709.80-535,011,073.95-211,475,488.83

Finding the Fourth Proportional to 387,686,709.80, 535,011,073.95 and 211,475,488.83

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Solution

The fourth proportional to 387,686,709.80, 535,011,073.95 and 211,475,488.83 is: 291,838,037.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,686,709.80 : 535,011,073.95 = 211,475,488.83 : x
  2. Step 2: Convert to fraction form
    387,686,709.80/535,011,073.95 = 211,475,488.83/x
  3. Step 3: Cross multiply
    387,686,709.80x = 535,011,073.95 × 211,475,488.83
  4. Step 4: Simplify right side
    387,686,709.80x = 113,141,728,391,826,272
  5. Step 5: Solve for x
    x = 113,141,728,391,826,272/387,686,709.80
  6. Step 6: Final answer
    x = 291,838,037.09

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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.