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Finding the Fourth Proportional to 760,907.68, 1,049,967.84 and 421,290.88

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Solution

The fourth proportional to 760,907.68, 1,049,967.84 and 421,290.88 is: 581,334.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,907.68 : 1,049,967.84 = 421,290.88 : x
  2. Step 2: Convert to fraction form
    760,907.68/1,049,967.84 = 421,290.88/x
  3. Step 3: Cross multiply
    760,907.68x = 1,049,967.84 × 421,290.88
  4. Step 4: Simplify right side
    760,907.68x = 442,341,875,285.30
  5. Step 5: Solve for x
    x = 442,341,875,285.30/760,907.68
  6. Step 6: Final answer
    x = 581,334.49

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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.