Home / 989,430.90-1,389,402.30-989,430.90

Finding the Fourth Proportional to 989,430.90, 1,389,402.30 and 989,430.90

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Solution

The fourth proportional to 989,430.90, 1,389,402.30 and 989,430.90 is: 1,389,402.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,430.90 : 1,389,402.30 = 989,430.90 : x
  2. Step 2: Convert to fraction form
    989,430.90/1,389,402.30 = 989,430.90/x
  3. Step 3: Cross multiply
    989,430.90x = 1,389,402.30 × 989,430.90
  4. Step 4: Simplify right side
    989,430.90x = 1,374,717,568,151.07
  5. Step 5: Solve for x
    x = 1,374,717,568,151.07/989,430.90
  6. Step 6: Final answer
    x = 1,389,402.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.