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Finding the Fourth Proportional to 416,047.40, 624,421.20 and 389,803.40

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Solution

The fourth proportional to 416,047.40, 624,421.20 and 389,803.40 is: 585,033.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,047.40 : 624,421.20 = 389,803.40 : x
  2. Step 2: Convert to fraction form
    416,047.40/624,421.20 = 389,803.40/x
  3. Step 3: Cross multiply
    416,047.40x = 624,421.20 × 389,803.40
  4. Step 4: Simplify right side
    416,047.40x = 243,401,506,792.08
  5. Step 5: Solve for x
    x = 243,401,506,792.08/416,047.40
  6. Step 6: Final answer
    x = 585,033.12

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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.