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Finding the Fourth Proportional to 593,490.78, 818,718.66 and 389,513.40

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Solution

The fourth proportional to 593,490.78, 818,718.66 and 389,513.40 is: 537,332.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    593,490.78 : 818,718.66 = 389,513.40 : x
  2. Step 2: Convert to fraction form
    593,490.78/818,718.66 = 389,513.40/x
  3. Step 3: Cross multiply
    593,490.78x = 818,718.66 × 389,513.40
  4. Step 4: Simplify right side
    593,490.78x = 318,901,888,900.04
  5. Step 5: Solve for x
    x = 318,901,888,900.04/593,490.78
  6. Step 6: Final answer
    x = 537,332.51

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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.