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Finding the Fourth Proportional to 913,880, 1,258,900.98 and 777,477.08

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Solution

The fourth proportional to 913,880, 1,258,900.98 and 777,477.08 is: 1,071,001.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,880 : 1,258,900.98 = 777,477.08 : x
  2. Step 2: Convert to fraction form
    913,880/1,258,900.98 = 777,477.08/x
  3. Step 3: Cross multiply
    913,880x = 1,258,900.98 × 777,477.08
  4. Step 4: Simplify right side
    913,880x = 978,766,657,939.54
  5. Step 5: Solve for x
    x = 978,766,657,939.54/913,880
  6. Step 6: Final answer
    x = 1,071,001.29

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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.