Home / 989,461.80-1,483,901.10-390,223.80

Finding the Fourth Proportional to 989,461.80, 1,483,901.10 and 390,223.80

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Solution

The fourth proportional to 989,461.80, 1,483,901.10 and 390,223.80 is: 585,220.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,461.80 : 1,483,901.10 = 390,223.80 : x
  2. Step 2: Convert to fraction form
    989,461.80/1,483,901.10 = 390,223.80/x
  3. Step 3: Cross multiply
    989,461.80x = 1,483,901.10 × 390,223.80
  4. Step 4: Simplify right side
    989,461.80x = 579,053,526,066.18
  5. Step 5: Solve for x
    x = 579,053,526,066.18/989,461.80
  6. Step 6: Final answer
    x = 585,220.70

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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.