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Finding the Fourth Proportional to 579,615.40, 869,423.10 and 402,322.60

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Solution

The fourth proportional to 579,615.40, 869,423.10 and 402,322.60 is: 603,483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,615.40 : 869,423.10 = 402,322.60 : x
  2. Step 2: Convert to fraction form
    579,615.40/869,423.10 = 402,322.60/x
  3. Step 3: Cross multiply
    579,615.40x = 869,423.10 × 402,322.60
  4. Step 4: Simplify right side
    579,615.40x = 349,788,562,092.06
  5. Step 5: Solve for x
    x = 349,788,562,092.06/579,615.40
  6. Step 6: Final answer
    x = 603,483.90

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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.