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Finding the Fourth Proportional to 611,289.60, 916,934.40 and 578,630.40

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Solution

The fourth proportional to 611,289.60, 916,934.40 and 578,630.40 is: 867,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,289.60 : 916,934.40 = 578,630.40 : x
  2. Step 2: Convert to fraction form
    611,289.60/916,934.40 = 578,630.40/x
  3. Step 3: Cross multiply
    611,289.60x = 916,934.40 × 578,630.40
  4. Step 4: Simplify right side
    611,289.60x = 530,566,118,645.76
  5. Step 5: Solve for x
    x = 530,566,118,645.76/611,289.60
  6. Step 6: Final answer
    x = 867,945.60

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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.