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Finding the Fourth Proportional to 554,420.70, 831,631.05 and 512,430.30

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Solution

The fourth proportional to 554,420.70, 831,631.05 and 512,430.30 is: 768,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,420.70 : 831,631.05 = 512,430.30 : x
  2. Step 2: Convert to fraction form
    554,420.70/831,631.05 = 512,430.30/x
  3. Step 3: Cross multiply
    554,420.70x = 831,631.05 × 512,430.30
  4. Step 4: Simplify right side
    554,420.70x = 426,152,948,440.82
  5. Step 5: Solve for x
    x = 426,152,948,440.82/554,420.70
  6. Step 6: Final answer
    x = 768,645.45

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Similar ratio
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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.