Home / 786,840.32-1,178,267.40-487,904.78

Finding the Fourth Proportional to 786,840.32, 1,178,267.40 and 487,904.78

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Solution

The fourth proportional to 786,840.32, 1,178,267.40 and 487,904.78 is: 730,621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,840.32 : 1,178,267.40 = 487,904.78 : x
  2. Step 2: Convert to fraction form
    786,840.32/1,178,267.40 = 487,904.78/x
  3. Step 3: Cross multiply
    786,840.32x = 1,178,267.40 × 487,904.78
  4. Step 4: Simplify right side
    786,840.32x = 574,882,296,578.17
  5. Step 5: Solve for x
    x = 574,882,296,578.17/786,840.32
  6. Step 6: Final answer
    x = 730,621.30

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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.