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Finding the Fourth Proportional to 488,423.40, 731,079.90 and 348,455.40

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Solution

The fourth proportional to 488,423.40, 731,079.90 and 348,455.40 is: 521,573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,423.40 : 731,079.90 = 348,455.40 : x
  2. Step 2: Convert to fraction form
    488,423.40/731,079.90 = 348,455.40/x
  3. Step 3: Cross multiply
    488,423.40x = 731,079.90 × 348,455.40
  4. Step 4: Simplify right side
    488,423.40x = 254,748,738,986.46
  5. Step 5: Solve for x
    x = 254,748,738,986.46/488,423.40
  6. Step 6: Final answer
    x = 521,573.58

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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.