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Finding the Fourth Proportional to 666,215.68, 919,119.40 and 424,454.96

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Solution

The fourth proportional to 666,215.68, 919,119.40 and 424,454.96 is: 585,583.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,215.68 : 919,119.40 = 424,454.96 : x
  2. Step 2: Convert to fraction form
    666,215.68/919,119.40 = 424,454.96/x
  3. Step 3: Cross multiply
    666,215.68x = 919,119.40 × 424,454.96
  4. Step 4: Simplify right side
    666,215.68x = 390,124,788,162.22
  5. Step 5: Solve for x
    x = 390,124,788,162.22/666,215.68
  6. Step 6: Final answer
    x = 585,583.32

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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.