Home / 987,089.76-1,478,386.56-772,519.20

Finding the Fourth Proportional to 987,089.76, 1,478,386.56 and 772,519.20

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Solution

The fourth proportional to 987,089.76, 1,478,386.56 and 772,519.20 is: 1,157,019.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,089.76 : 1,478,386.56 = 772,519.20 : x
  2. Step 2: Convert to fraction form
    987,089.76/1,478,386.56 = 772,519.20/x
  3. Step 3: Cross multiply
    987,089.76x = 1,478,386.56 × 772,519.20
  4. Step 4: Simplify right side
    987,089.76x = 1,142,082,002,621.95
  5. Step 5: Solve for x
    x = 1,142,082,002,621.95/987,089.76
  6. Step 6: Final answer
    x = 1,157,019.40

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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.