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Finding the Fourth Proportional to 717,907.98, 990,666.15 and 395,618.01

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Solution

The fourth proportional to 717,907.98, 990,666.15 and 395,618.01 is: 545,927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,907.98 : 990,666.15 = 395,618.01 : x
  2. Step 2: Convert to fraction form
    717,907.98/990,666.15 = 395,618.01/x
  3. Step 3: Cross multiply
    717,907.98x = 990,666.15 × 395,618.01
  4. Step 4: Simplify right side
    717,907.98x = 391,925,370,837.36
  5. Step 5: Solve for x
    x = 391,925,370,837.36/717,907.98
  6. Step 6: Final answer
    x = 545,927.03

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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.