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Finding the Fourth Proportional to 1,347.51, 1,860.29 and 907.74

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Solution

The fourth proportional to 1,347.51, 1,860.29 and 907.74 is: 1,253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.51 : 1,860.29 = 907.74 : x
  2. Step 2: Convert to fraction form
    1,347.51/1,860.29 = 907.74/x
  3. Step 3: Cross multiply
    1,347.51x = 1,860.29 × 907.74
  4. Step 4: Simplify right side
    1,347.51x = 1,688,645.80
  5. Step 5: Solve for x
    x = 1,688,645.80/1,347.51
  6. Step 6: Final answer
    x = 1,253.16

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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.