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Finding the Fourth Proportional to 565,526.30, 780,406.55 and 310,875.66

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Solution

The fourth proportional to 565,526.30, 780,406.55 and 310,875.66 is: 428,997.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,526.30 : 780,406.55 = 310,875.66 : x
  2. Step 2: Convert to fraction form
    565,526.30/780,406.55 = 310,875.66/x
  3. Step 3: Cross multiply
    565,526.30x = 780,406.55 × 310,875.66
  4. Step 4: Simplify right side
    565,526.30x = 242,609,401,299.57
  5. Step 5: Solve for x
    x = 242,609,401,299.57/565,526.30
  6. Step 6: Final answer
    x = 428,997.56

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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.