Home / 678,510.20-936,307.52-376,684.76

Finding the Fourth Proportional to 678,510.20, 936,307.52 and 376,684.76

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Solution

The fourth proportional to 678,510.20, 936,307.52 and 376,684.76 is: 519,804.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,510.20 : 936,307.52 = 376,684.76 : x
  2. Step 2: Convert to fraction form
    678,510.20/936,307.52 = 376,684.76/x
  3. Step 3: Cross multiply
    678,510.20x = 936,307.52 × 376,684.76
  4. Step 4: Simplify right side
    678,510.20x = 352,692,773,457.40
  5. Step 5: Solve for x
    x = 352,692,773,457.40/678,510.20
  6. Step 6: Final answer
    x = 519,804.67

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Double scale
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Similar ratio
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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.