Home / 2,478,218.28-3,420,000.15-1,390,570.30

Finding the Fourth Proportional to 2,478,218.28, 3,420,000.15 and 1,390,570.30

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Solution

The fourth proportional to 2,478,218.28, 3,420,000.15 and 1,390,570.30 is: 1,919,020.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478,218.28 : 3,420,000.15 = 1,390,570.30 : x
  2. Step 2: Convert to fraction form
    2,478,218.28/3,420,000.15 = 1,390,570.30/x
  3. Step 3: Cross multiply
    2,478,218.28x = 3,420,000.15 × 1,390,570.30
  4. Step 4: Simplify right side
    2,478,218.28x = 4,755,750,634,585.55
  5. Step 5: Solve for x
    x = 4,755,750,634,585.55/2,478,218.28
  6. Step 6: Final answer
    x = 1,919,020.08

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1.5x scale

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.