Home / 990,043.80-1,484,774.10-390,805.80

Finding the Fourth Proportional to 990,043.80, 1,484,774.10 and 390,805.80

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Solution

The fourth proportional to 990,043.80, 1,484,774.10 and 390,805.80 is: 586,093.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,043.80 : 1,484,774.10 = 390,805.80 : x
  2. Step 2: Convert to fraction form
    990,043.80/1,484,774.10 = 390,805.80/x
  3. Step 3: Cross multiply
    990,043.80x = 1,484,774.10 × 390,805.80
  4. Step 4: Simplify right side
    990,043.80x = 580,258,329,969.78
  5. Step 5: Solve for x
    x = 580,258,329,969.78/990,043.80
  6. Step 6: Final answer
    x = 586,093.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.