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Finding the Fourth Proportional to 803,748.60, 1,207,005.30 and 778,865.40

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Solution

The fourth proportional to 803,748.60, 1,207,005.30 and 778,865.40 is: 1,169,637.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,748.60 : 1,207,005.30 = 778,865.40 : x
  2. Step 2: Convert to fraction form
    803,748.60/1,207,005.30 = 778,865.40/x
  3. Step 3: Cross multiply
    803,748.60x = 1,207,005.30 × 778,865.40
  4. Step 4: Simplify right side
    803,748.60x = 940,094,665,786.62
  5. Step 5: Solve for x
    x = 940,094,665,786.62/803,748.60
  6. Step 6: Final answer
    x = 1,169,637.70

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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.