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Finding the Fourth Proportional to 553,286.40, 829,929.60 and 402,820.80

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Solution

The fourth proportional to 553,286.40, 829,929.60 and 402,820.80 is: 604,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,286.40 : 829,929.60 = 402,820.80 : x
  2. Step 2: Convert to fraction form
    553,286.40/829,929.60 = 402,820.80/x
  3. Step 3: Cross multiply
    553,286.40x = 829,929.60 × 402,820.80
  4. Step 4: Simplify right side
    553,286.40x = 334,312,905,415.68
  5. Step 5: Solve for x
    x = 334,312,905,415.68/553,286.40
  6. Step 6: Final answer
    x = 604,231.20

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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.