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Finding the Fourth Proportional to 660,087.26, 910,888.93 and 405,389.24

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Solution

The fourth proportional to 660,087.26, 910,888.93 and 405,389.24 is: 559,417.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,087.26 : 910,888.93 = 405,389.24 : x
  2. Step 2: Convert to fraction form
    660,087.26/910,888.93 = 405,389.24/x
  3. Step 3: Cross multiply
    660,087.26x = 910,888.93 × 405,389.24
  4. Step 4: Simplify right side
    660,087.26x = 369,264,571,057.11
  5. Step 5: Solve for x
    x = 369,264,571,057.11/660,087.26
  6. Step 6: Final answer
    x = 559,417.81

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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.