Home / 989,764.20-1,485,035.10-390,623.40

Finding the Fourth Proportional to 989,764.20, 1,485,035.10 and 390,623.40

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Solution

The fourth proportional to 989,764.20, 1,485,035.10 and 390,623.40 is: 586,088.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,764.20 : 1,485,035.10 = 390,623.40 : x
  2. Step 2: Convert to fraction form
    989,764.20/1,485,035.10 = 390,623.40/x
  3. Step 3: Cross multiply
    989,764.20x = 1,485,035.10 × 390,623.40
  4. Step 4: Simplify right side
    989,764.20x = 580,089,459,881.34
  5. Step 5: Solve for x
    x = 580,089,459,881.34/989,764.20
  6. Step 6: Final answer
    x = 586,088.55

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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.