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Finding the Fourth Proportional to 554,421.20, 831,631.80 and 512,430.80

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Solution

The fourth proportional to 554,421.20, 831,631.80 and 512,430.80 is: 768,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,421.20 : 831,631.80 = 512,430.80 : x
  2. Step 2: Convert to fraction form
    554,421.20/831,631.80 = 512,430.80/x
  3. Step 3: Cross multiply
    554,421.20x = 831,631.80 × 512,430.80
  4. Step 4: Simplify right side
    554,421.20x = 426,153,748,579.44
  5. Step 5: Solve for x
    x = 426,153,748,579.44/554,421.20
  6. Step 6: Final answer
    x = 768,646.20

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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.