Home / 385,309.55-531,705.79-215,510.87

Finding the Fourth Proportional to 385,309.55, 531,705.79 and 215,510.87

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Solution

The fourth proportional to 385,309.55, 531,705.79 and 215,510.87 is: 297,393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,309.55 : 531,705.79 = 215,510.87 : x
  2. Step 2: Convert to fraction form
    385,309.55/531,705.79 = 215,510.87/x
  3. Step 3: Cross multiply
    385,309.55x = 531,705.79 × 215,510.87
  4. Step 4: Simplify right side
    385,309.55x = 114,588,377,386.94
  5. Step 5: Solve for x
    x = 114,588,377,386.94/385,309.55
  6. Step 6: Final answer
    x = 297,393.04

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1.5x scale

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.