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Finding the Fourth Proportional to 369,114.40, 553,642.80 and 144,431.20

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Solution

The fourth proportional to 369,114.40, 553,642.80 and 144,431.20 is: 216,635.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,114.40 : 553,642.80 = 144,431.20 : x
  2. Step 2: Convert to fraction form
    369,114.40/553,642.80 = 144,431.20/x
  3. Step 3: Cross multiply
    369,114.40x = 553,642.80 × 144,431.20
  4. Step 4: Simplify right side
    369,114.40x = 79,963,293,975.36
  5. Step 5: Solve for x
    x = 79,963,293,975.36/369,114.40
  6. Step 6: Final answer
    x = 216,635.53

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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.