Home / 513,541,123.81-708,626,963.57-287,492,485.55

Finding the Fourth Proportional to 513,541,123.81, 708,626,963.57 and 287,492,485.55

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Solution

The fourth proportional to 513,541,123.81, 708,626,963.57 and 287,492,485.55 is: 396,706,159.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,541,123.81 : 708,626,963.57 = 287,492,485.55 : x
  2. Step 2: Convert to fraction form
    513,541,123.81/708,626,963.57 = 287,492,485.55/x
  3. Step 3: Cross multiply
    513,541,123.81x = 708,626,963.57 × 287,492,485.55
  4. Step 4: Simplify right side
    513,541,123.81x = 203,724,927,079,508,032
  5. Step 5: Solve for x
    x = 203,724,927,079,508,032/513,541,123.81
  6. Step 6: Final answer
    x = 396,706,159.71

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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.