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Finding the Fourth Proportional to 666,870.67, 920,281.43 and 360,946.97

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Solution

The fourth proportional to 666,870.67, 920,281.43 and 360,946.97 is: 498,106.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,870.67 : 920,281.43 = 360,946.97 : x
  2. Step 2: Convert to fraction form
    666,870.67/920,281.43 = 360,946.97/x
  3. Step 3: Cross multiply
    666,870.67x = 920,281.43 × 360,946.97
  4. Step 4: Simplify right side
    666,870.67x = 332,172,793,705.77
  5. Step 5: Solve for x
    x = 332,172,793,705.77/666,870.67
  6. Step 6: Final answer
    x = 498,106.77

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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.