Home / 778,579.20-1,167,868.80-478,085.40

Finding the Fourth Proportional to 778,579.20, 1,167,868.80 and 478,085.40

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Solution

The fourth proportional to 778,579.20, 1,167,868.80 and 478,085.40 is: 717,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,579.20 : 1,167,868.80 = 478,085.40 : x
  2. Step 2: Convert to fraction form
    778,579.20/1,167,868.80 = 478,085.40/x
  3. Step 3: Cross multiply
    778,579.20x = 1,167,868.80 × 478,085.40
  4. Step 4: Simplify right side
    778,579.20x = 558,341,022,395.52
  5. Step 5: Solve for x
    x = 558,341,022,395.52/778,579.20
  6. Step 6: Final answer
    x = 717,128.10

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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.