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Finding the Fourth Proportional to 666,376.18, 918,642.59 and 475,057.42

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Solution

The fourth proportional to 666,376.18, 918,642.59 and 475,057.42 is: 654,897.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,376.18 : 918,642.59 = 475,057.42 : x
  2. Step 2: Convert to fraction form
    666,376.18/918,642.59 = 475,057.42/x
  3. Step 3: Cross multiply
    666,376.18x = 918,642.59 × 475,057.42
  4. Step 4: Simplify right side
    666,376.18x = 436,407,976,332.23
  5. Step 5: Solve for x
    x = 436,407,976,332.23/666,376.18
  6. Step 6: Final answer
    x = 654,897.32

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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.