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Finding the Fourth Proportional to 385,412.90, 577,384.95 and 207,860.90

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Solution

The fourth proportional to 385,412.90, 577,384.95 and 207,860.90 is: 311,395.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,412.90 : 577,384.95 = 207,860.90 : x
  2. Step 2: Convert to fraction form
    385,412.90/577,384.95 = 207,860.90/x
  3. Step 3: Cross multiply
    385,412.90x = 577,384.95 × 207,860.90
  4. Step 4: Simplify right side
    385,412.90x = 120,015,755,353.46
  5. Step 5: Solve for x
    x = 120,015,755,353.46/385,412.90
  6. Step 6: Final answer
    x = 311,395.27

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1.5x scale

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.