Home / 1,390,289.78-1,918,154.04-778,352.60

Finding the Fourth Proportional to 1,390,289.78, 1,918,154.04 and 778,352.60

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Solution

The fourth proportional to 1,390,289.78, 1,918,154.04 and 778,352.60 is: 1,073,876.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,289.78 : 1,918,154.04 = 778,352.60 : x
  2. Step 2: Convert to fraction form
    1,390,289.78/1,918,154.04 = 778,352.60/x
  3. Step 3: Cross multiply
    1,390,289.78x = 1,918,154.04 × 778,352.60
  4. Step 4: Simplify right side
    1,390,289.78x = 1,493,000,184,234.50
  5. Step 5: Solve for x
    x = 1,493,000,184,234.50/1,390,289.78
  6. Step 6: Final answer
    x = 1,073,876.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.