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Finding the Fourth Proportional to 553,590.80, 830,386.20 and 354,136.40

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Solution

The fourth proportional to 553,590.80, 830,386.20 and 354,136.40 is: 531,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,590.80 : 830,386.20 = 354,136.40 : x
  2. Step 2: Convert to fraction form
    553,590.80/830,386.20 = 354,136.40/x
  3. Step 3: Cross multiply
    553,590.80x = 830,386.20 × 354,136.40
  4. Step 4: Simplify right side
    553,590.80x = 294,069,979,477.68
  5. Step 5: Solve for x
    x = 294,069,979,477.68/553,590.80
  6. Step 6: Final answer
    x = 531,204.60

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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.