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Finding the Fourth Proportional to 559,931.40, 837,928.80 and 390,657.60

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Solution

The fourth proportional to 559,931.40, 837,928.80 and 390,657.60 is: 584,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,931.40 : 837,928.80 = 390,657.60 : x
  2. Step 2: Convert to fraction form
    559,931.40/837,928.80 = 390,657.60/x
  3. Step 3: Cross multiply
    559,931.40x = 837,928.80 × 390,657.60
  4. Step 4: Simplify right side
    559,931.40x = 327,343,253,978.88
  5. Step 5: Solve for x
    x = 327,343,253,978.88/559,931.40
  6. Step 6: Final answer
    x = 584,613.14

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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.