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Finding the Fourth Proportional to 628,085.70, 942,128.55 and 450,938.70

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Solution

The fourth proportional to 628,085.70, 942,128.55 and 450,938.70 is: 676,408.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,085.70 : 942,128.55 = 450,938.70 : x
  2. Step 2: Convert to fraction form
    628,085.70/942,128.55 = 450,938.70/x
  3. Step 3: Cross multiply
    628,085.70x = 942,128.55 × 450,938.70
  4. Step 4: Simplify right side
    628,085.70x = 424,842,223,569.89
  5. Step 5: Solve for x
    x = 424,842,223,569.89/628,085.70
  6. Step 6: Final answer
    x = 676,408.05

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Double scale
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Similar ratio
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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.