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Finding the Fourth Proportional to 803,745.60, 1,207,000.80 and 778,862.40

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Solution

The fourth proportional to 803,745.60, 1,207,000.80 and 778,862.40 is: 1,169,633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,745.60 : 1,207,000.80 = 778,862.40 : x
  2. Step 2: Convert to fraction form
    803,745.60/1,207,000.80 = 778,862.40/x
  3. Step 3: Cross multiply
    803,745.60x = 1,207,000.80 × 778,862.40
  4. Step 4: Simplify right side
    803,745.60x = 940,087,539,889.92
  5. Step 5: Solve for x
    x = 940,087,539,889.92/803,745.60
  6. Step 6: Final answer
    x = 1,169,633.20

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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.