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Finding the Fourth Proportional to 565,515.24, 780,421.68 and 310,866.36

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Solution

The fourth proportional to 565,515.24, 780,421.68 and 310,866.36 is: 429,001.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,515.24 : 780,421.68 = 310,866.36 : x
  2. Step 2: Convert to fraction form
    565,515.24/780,421.68 = 310,866.36/x
  3. Step 3: Cross multiply
    565,515.24x = 780,421.68 × 310,866.36
  4. Step 4: Simplify right side
    565,515.24x = 242,606,846,926.69
  5. Step 5: Solve for x
    x = 242,606,846,926.69/565,515.24
  6. Step 6: Final answer
    x = 429,001.43

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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.