Home / 385,001.60-531,314.40-215,235.20

Finding the Fourth Proportional to 385,001.60, 531,314.40 and 215,235.20

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Solution

The fourth proportional to 385,001.60, 531,314.40 and 215,235.20 is: 297,031.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,001.60 : 531,314.40 = 215,235.20 : x
  2. Step 2: Convert to fraction form
    385,001.60/531,314.40 = 215,235.20/x
  3. Step 3: Cross multiply
    385,001.60x = 531,314.40 × 215,235.20
  4. Step 4: Simplify right side
    385,001.60x = 114,357,561,146.88
  5. Step 5: Solve for x
    x = 114,357,561,146.88/385,001.60
  6. Step 6: Final answer
    x = 297,031.39

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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.