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Finding the Fourth Proportional to 416,627.40, 624,941.10 and 390,383.40

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Solution

The fourth proportional to 416,627.40, 624,941.10 and 390,383.40 is: 585,575.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,627.40 : 624,941.10 = 390,383.40 : x
  2. Step 2: Convert to fraction form
    416,627.40/624,941.10 = 390,383.40/x
  3. Step 3: Cross multiply
    416,627.40x = 624,941.10 × 390,383.40
  4. Step 4: Simplify right side
    416,627.40x = 243,966,631,417.74
  5. Step 5: Solve for x
    x = 243,966,631,417.74/416,627.40
  6. Step 6: Final answer
    x = 585,575.10

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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.