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Finding the Fourth Proportional to 570,628.80, 787,352.40 and 315,932.40

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Solution

The fourth proportional to 570,628.80, 787,352.40 and 315,932.40 is: 435,922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,628.80 : 787,352.40 = 315,932.40 : x
  2. Step 2: Convert to fraction form
    570,628.80/787,352.40 = 315,932.40/x
  3. Step 3: Cross multiply
    570,628.80x = 787,352.40 × 315,932.40
  4. Step 4: Simplify right side
    570,628.80x = 248,750,133,377.76
  5. Step 5: Solve for x
    x = 248,750,133,377.76/570,628.80
  6. Step 6: Final answer
    x = 435,922.85

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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.