Home / 989,871.80-1,484,516.10-390,633.80

Finding the Fourth Proportional to 989,871.80, 1,484,516.10 and 390,633.80

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Solution

The fourth proportional to 989,871.80, 1,484,516.10 and 390,633.80 is: 585,835.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,871.80 : 1,484,516.10 = 390,633.80 : x
  2. Step 2: Convert to fraction form
    989,871.80/1,484,516.10 = 390,633.80/x
  3. Step 3: Cross multiply
    989,871.80x = 1,484,516.10 × 390,633.80
  4. Step 4: Simplify right side
    989,871.80x = 579,902,165,304.18
  5. Step 5: Solve for x
    x = 579,902,165,304.18/989,871.80
  6. Step 6: Final answer
    x = 585,835.63

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Double scale
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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.