Home / 918,004.60-1,377,006.90-386,126.20

Finding the Fourth Proportional to 918,004.60, 1,377,006.90 and 386,126.20

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Solution

The fourth proportional to 918,004.60, 1,377,006.90 and 386,126.20 is: 579,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,004.60 : 1,377,006.90 = 386,126.20 : x
  2. Step 2: Convert to fraction form
    918,004.60/1,377,006.90 = 386,126.20/x
  3. Step 3: Cross multiply
    918,004.60x = 1,377,006.90 × 386,126.20
  4. Step 4: Simplify right side
    918,004.60x = 531,698,441,670.78
  5. Step 5: Solve for x
    x = 531,698,441,670.78/918,004.60
  6. Step 6: Final answer
    x = 579,189.30

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1.5x scale

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.