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Finding the Fourth Proportional to 648,367.80, 971,312.40 and 348,748.80

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Solution

The fourth proportional to 648,367.80, 971,312.40 and 348,748.80 is: 522,456.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,367.80 : 971,312.40 = 348,748.80 : x
  2. Step 2: Convert to fraction form
    648,367.80/971,312.40 = 348,748.80/x
  3. Step 3: Cross multiply
    648,367.80x = 971,312.40 × 348,748.80
  4. Step 4: Simplify right side
    648,367.80x = 338,744,033,925.12
  5. Step 5: Solve for x
    x = 338,744,033,925.12/648,367.80
  6. Step 6: Final answer
    x = 522,456.60

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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.