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Finding the Fourth Proportional to 553,420.40, 830,130.60 and 455,005.40

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Solution

The fourth proportional to 553,420.40, 830,130.60 and 455,005.40 is: 682,508.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,420.40 : 830,130.60 = 455,005.40 : x
  2. Step 2: Convert to fraction form
    553,420.40/830,130.60 = 455,005.40/x
  3. Step 3: Cross multiply
    553,420.40x = 830,130.60 × 455,005.40
  4. Step 4: Simplify right side
    553,420.40x = 377,713,905,705.24
  5. Step 5: Solve for x
    x = 377,713,905,705.24/553,420.40
  6. Step 6: Final answer
    x = 682,508.10

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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.