Home / 787,280.80-1,180,114.80-387,306.40

Finding the Fourth Proportional to 787,280.80, 1,180,114.80 and 387,306.40

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Solution

The fourth proportional to 787,280.80, 1,180,114.80 and 387,306.40 is: 580,562.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,280.80 : 1,180,114.80 = 387,306.40 : x
  2. Step 2: Convert to fraction form
    787,280.80/1,180,114.80 = 387,306.40/x
  3. Step 3: Cross multiply
    787,280.80x = 1,180,114.80 × 387,306.40
  4. Step 4: Simplify right side
    787,280.80x = 457,066,014,774.72
  5. Step 5: Solve for x
    x = 457,066,014,774.72/787,280.80
  6. Step 6: Final answer
    x = 580,562.89

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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.