Home / 385,561.40-578,342.10-148,911.80

Finding the Fourth Proportional to 385,561.40, 578,342.10 and 148,911.80

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Solution

The fourth proportional to 385,561.40, 578,342.10 and 148,911.80 is: 223,367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,561.40 : 578,342.10 = 148,911.80 : x
  2. Step 2: Convert to fraction form
    385,561.40/578,342.10 = 148,911.80/x
  3. Step 3: Cross multiply
    385,561.40x = 578,342.10 × 148,911.80
  4. Step 4: Simplify right side
    385,561.40x = 86,121,963,126.78
  5. Step 5: Solve for x
    x = 86,121,963,126.78/385,561.40
  6. Step 6: Final answer
    x = 223,367.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.