Home / 1,438,291.60-2,155,920.77-478,490.85

Finding the Fourth Proportional to 1,438,291.60, 2,155,920.77 and 478,490.85

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Solution

The fourth proportional to 1,438,291.60, 2,155,920.77 and 478,490.85 is: 717,231.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,291.60 : 2,155,920.77 = 478,490.85 : x
  2. Step 2: Convert to fraction form
    1,438,291.60/2,155,920.77 = 478,490.85/x
  3. Step 3: Cross multiply
    1,438,291.60x = 2,155,920.77 × 478,490.85
  4. Step 4: Simplify right side
    1,438,291.60x = 1,031,588,362,966.18
  5. Step 5: Solve for x
    x = 1,031,588,362,966.18/1,438,291.60
  6. Step 6: Final answer
    x = 717,231.72

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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.