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Finding the Fourth Proportional to 416,247.40, 624,371.10 and 390,003.40

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Solution

The fourth proportional to 416,247.40, 624,371.10 and 390,003.40 is: 585,005.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,247.40 : 624,371.10 = 390,003.40 : x
  2. Step 2: Convert to fraction form
    416,247.40/624,371.10 = 390,003.40/x
  3. Step 3: Cross multiply
    416,247.40x = 624,371.10 × 390,003.40
  4. Step 4: Simplify right side
    416,247.40x = 243,506,851,861.74
  5. Step 5: Solve for x
    x = 243,506,851,861.74/416,247.40
  6. Step 6: Final answer
    x = 585,005.10

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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.