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Finding the Fourth Proportional to 702,980.79, 970,111.56 and 380,690.80

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Solution

The fourth proportional to 702,980.79, 970,111.56 and 380,690.80 is: 525,352.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,980.79 : 970,111.56 = 380,690.80 : x
  2. Step 2: Convert to fraction form
    702,980.79/970,111.56 = 380,690.80/x
  3. Step 3: Cross multiply
    702,980.79x = 970,111.56 × 380,690.80
  4. Step 4: Simplify right side
    702,980.79x = 369,312,545,865.65
  5. Step 5: Solve for x
    x = 369,312,545,865.65/702,980.79
  6. Step 6: Final answer
    x = 525,352.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.