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Finding the Fourth Proportional to 710,728.06, 980,802.36 and 388,438.07

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Solution

The fourth proportional to 710,728.06, 980,802.36 and 388,438.07 is: 536,043.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,728.06 : 980,802.36 = 388,438.07 : x
  2. Step 2: Convert to fraction form
    710,728.06/980,802.36 = 388,438.07/x
  3. Step 3: Cross multiply
    710,728.06x = 980,802.36 × 388,438.07
  4. Step 4: Simplify right side
    710,728.06x = 380,980,975,769.85
  5. Step 5: Solve for x
    x = 380,980,975,769.85/710,728.06
  6. Step 6: Final answer
    x = 536,043.25

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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.