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Finding the Fourth Proportional to 651,681.20, 977,521.80 and 385,304.60

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Solution

The fourth proportional to 651,681.20, 977,521.80 and 385,304.60 is: 577,956.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,681.20 : 977,521.80 = 385,304.60 : x
  2. Step 2: Convert to fraction form
    651,681.20/977,521.80 = 385,304.60/x
  3. Step 3: Cross multiply
    651,681.20x = 977,521.80 × 385,304.60
  4. Step 4: Simplify right side
    651,681.20x = 376,643,646,140.28
  5. Step 5: Solve for x
    x = 376,643,646,140.28/651,681.20
  6. Step 6: Final answer
    x = 577,956.90

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Double scale
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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.