Home / 678,631.20-1,017,946.80-620,570.40

Finding the Fourth Proportional to 678,631.20, 1,017,946.80 and 620,570.40

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Solution

The fourth proportional to 678,631.20, 1,017,946.80 and 620,570.40 is: 930,855.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,631.20 : 1,017,946.80 = 620,570.40 : x
  2. Step 2: Convert to fraction form
    678,631.20/1,017,946.80 = 620,570.40/x
  3. Step 3: Cross multiply
    678,631.20x = 1,017,946.80 × 620,570.40
  4. Step 4: Simplify right side
    678,631.20x = 631,707,652,854.72
  5. Step 5: Solve for x
    x = 631,707,652,854.72/678,631.20
  6. Step 6: Final answer
    x = 930,855.60

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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.