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Finding the Fourth Proportional to 553,979.40, 830,969.10 and 455,564.40

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Solution

The fourth proportional to 553,979.40, 830,969.10 and 455,564.40 is: 683,346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,979.40 : 830,969.10 = 455,564.40 : x
  2. Step 2: Convert to fraction form
    553,979.40/830,969.10 = 455,564.40/x
  3. Step 3: Cross multiply
    553,979.40x = 830,969.10 × 455,564.40
  4. Step 4: Simplify right side
    553,979.40x = 378,559,939,460.04
  5. Step 5: Solve for x
    x = 378,559,939,460.04/553,979.40
  6. Step 6: Final answer
    x = 683,346.60

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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.