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Finding the Fourth Proportional to 1,653.40, 2,281.70 and 907.39

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Solution

The fourth proportional to 1,653.40, 2,281.70 and 907.39 is: 1,252.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.40 : 2,281.70 = 907.39 : x
  2. Step 2: Convert to fraction form
    1,653.40/2,281.70 = 907.39/x
  3. Step 3: Cross multiply
    1,653.40x = 2,281.70 × 907.39
  4. Step 4: Simplify right side
    1,653.40x = 2,070,391.76
  5. Step 5: Solve for x
    x = 2,070,391.76/1,653.40
  6. Step 6: Final answer
    x = 1,252.20

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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.