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Finding the Fourth Proportional to 545,389.20, 818,569.80 and 320,468.40

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Solution

The fourth proportional to 545,389.20, 818,569.80 and 320,468.40 is: 480,988.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,389.20 : 818,569.80 = 320,468.40 : x
  2. Step 2: Convert to fraction form
    545,389.20/818,569.80 = 320,468.40/x
  3. Step 3: Cross multiply
    545,389.20x = 818,569.80 × 320,468.40
  4. Step 4: Simplify right side
    545,389.20x = 262,325,754,094.32
  5. Step 5: Solve for x
    x = 262,325,754,094.32/545,389.20
  6. Step 6: Final answer
    x = 480,988.17

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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.