Home / 860,621.80-1,187,700.08-478,640.38

Finding the Fourth Proportional to 860,621.80, 1,187,700.08 and 478,640.38

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Solution

The fourth proportional to 860,621.80, 1,187,700.08 and 478,640.38 is: 660,547.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,621.80 : 1,187,700.08 = 478,640.38 : x
  2. Step 2: Convert to fraction form
    860,621.80/1,187,700.08 = 478,640.38/x
  3. Step 3: Cross multiply
    860,621.80x = 1,187,700.08 × 478,640.38
  4. Step 4: Simplify right side
    860,621.80x = 568,481,217,617.23
  5. Step 5: Solve for x
    x = 568,481,217,617.23/860,621.80
  6. Step 6: Final answer
    x = 660,547.08

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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.