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Finding the Fourth Proportional to 917,216.80, 1,374,658.80 and 442,880.80

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Solution

The fourth proportional to 917,216.80, 1,374,658.80 and 442,880.80 is: 663,758.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,216.80 : 1,374,658.80 = 442,880.80 : x
  2. Step 2: Convert to fraction form
    917,216.80/1,374,658.80 = 442,880.80/x
  3. Step 3: Cross multiply
    917,216.80x = 1,374,658.80 × 442,880.80
  4. Step 4: Simplify right side
    917,216.80x = 608,809,989,071.04
  5. Step 5: Solve for x
    x = 608,809,989,071.04/917,216.80
  6. Step 6: Final answer
    x = 663,758.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.