Home / 385,431.04-531,909.75-215,661.52

Finding the Fourth Proportional to 385,431.04, 531,909.75 and 215,661.52

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Solution

The fourth proportional to 385,431.04, 531,909.75 and 215,661.52 is: 297,621.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,431.04 : 531,909.75 = 215,661.52 : x
  2. Step 2: Convert to fraction form
    385,431.04/531,909.75 = 215,661.52/x
  3. Step 3: Cross multiply
    385,431.04x = 531,909.75 × 215,661.52
  4. Step 4: Simplify right side
    385,431.04x = 114,712,465,187.82
  5. Step 5: Solve for x
    x = 114,712,465,187.82/385,431.04
  6. Step 6: Final answer
    x = 297,621.24

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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.