Home / 687,870.20-949,260.86-386,064.20

Finding the Fourth Proportional to 687,870.20, 949,260.86 and 386,064.20

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Solution

The fourth proportional to 687,870.20, 949,260.86 and 386,064.20 is: 532,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,870.20 : 949,260.86 = 386,064.20 : x
  2. Step 2: Convert to fraction form
    687,870.20/949,260.86 = 386,064.20/x
  3. Step 3: Cross multiply
    687,870.20x = 949,260.86 × 386,064.20
  4. Step 4: Simplify right side
    687,870.20x = 366,475,627,830.59
  5. Step 5: Solve for x
    x = 366,475,627,830.59/687,870.20
  6. Step 6: Final answer
    x = 532,768.58

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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.