Home / 687,130.20-1,030,695.30-288,221.40

Finding the Fourth Proportional to 687,130.20, 1,030,695.30 and 288,221.40

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Solution

The fourth proportional to 687,130.20, 1,030,695.30 and 288,221.40 is: 432,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,130.20 : 1,030,695.30 = 288,221.40 : x
  2. Step 2: Convert to fraction form
    687,130.20/1,030,695.30 = 288,221.40/x
  3. Step 3: Cross multiply
    687,130.20x = 1,030,695.30 × 288,221.40
  4. Step 4: Simplify right side
    687,130.20x = 297,068,442,339.42
  5. Step 5: Solve for x
    x = 297,068,442,339.42/687,130.20
  6. Step 6: Final answer
    x = 432,332.10

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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.