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Finding the Fourth Proportional to 520,718.40, 718,502.40 and 294,359.04

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Solution

The fourth proportional to 520,718.40, 718,502.40 and 294,359.04 is: 406,165.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,718.40 : 718,502.40 = 294,359.04 : x
  2. Step 2: Convert to fraction form
    520,718.40/718,502.40 = 294,359.04/x
  3. Step 3: Cross multiply
    520,718.40x = 718,502.40 × 294,359.04
  4. Step 4: Simplify right side
    520,718.40x = 211,497,676,701.70
  5. Step 5: Solve for x
    x = 211,497,676,701.70/520,718.40
  6. Step 6: Final answer
    x = 406,165.17

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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.