Home / 989,471.80-1,483,916.10-390,233.80

Finding the Fourth Proportional to 989,471.80, 1,483,916.10 and 390,233.80

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Solution

The fourth proportional to 989,471.80, 1,483,916.10 and 390,233.80 is: 585,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,471.80 : 1,483,916.10 = 390,233.80 : x
  2. Step 2: Convert to fraction form
    989,471.80/1,483,916.10 = 390,233.80/x
  3. Step 3: Cross multiply
    989,471.80x = 1,483,916.10 × 390,233.80
  4. Step 4: Simplify right side
    989,471.80x = 579,074,218,584.18
  5. Step 5: Solve for x
    x = 579,074,218,584.18/989,471.80
  6. Step 6: Final answer
    x = 585,235.70

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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.