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Finding the Fourth Proportional to 876,649.80, 1,314,585.90 and 403,480.20

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Solution

The fourth proportional to 876,649.80, 1,314,585.90 and 403,480.20 is: 605,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,649.80 : 1,314,585.90 = 403,480.20 : x
  2. Step 2: Convert to fraction form
    876,649.80/1,314,585.90 = 403,480.20/x
  3. Step 3: Cross multiply
    876,649.80x = 1,314,585.90 × 403,480.20
  4. Step 4: Simplify right side
    876,649.80x = 530,409,381,849.18
  5. Step 5: Solve for x
    x = 530,409,381,849.18/876,649.80
  6. Step 6: Final answer
    x = 605,041.35

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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.