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Finding the Fourth Proportional to 655,408.32, 904,531.52 and 400,928.80

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Solution

The fourth proportional to 655,408.32, 904,531.52 and 400,928.80 is: 553,323.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,408.32 : 904,531.52 = 400,928.80 : x
  2. Step 2: Convert to fraction form
    655,408.32/904,531.52 = 400,928.80/x
  3. Step 3: Cross multiply
    655,408.32x = 904,531.52 × 400,928.80
  4. Step 4: Simplify right side
    655,408.32x = 362,652,736,875.78
  5. Step 5: Solve for x
    x = 362,652,736,875.78/655,408.32
  6. Step 6: Final answer
    x = 553,323.36

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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.