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Finding the Fourth Proportional to 878,888.16, 1,212,858.72 and 496,990.08

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Solution

The fourth proportional to 878,888.16, 1,212,858.72 and 496,990.08 is: 685,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,888.16 : 1,212,858.72 = 496,990.08 : x
  2. Step 2: Convert to fraction form
    878,888.16/1,212,858.72 = 496,990.08/x
  3. Step 3: Cross multiply
    878,888.16x = 1,212,858.72 × 496,990.08
  4. Step 4: Simplify right side
    878,888.16x = 602,778,752,281.50
  5. Step 5: Solve for x
    x = 602,778,752,281.50/878,888.16
  6. Step 6: Final answer
    x = 685,842.39

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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.