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Finding the Fourth Proportional to 390,054.70, 583,915.65 and 366,985.90

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Solution

The fourth proportional to 390,054.70, 583,915.65 and 366,985.90 is: 549,381.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,054.70 : 583,915.65 = 366,985.90 : x
  2. Step 2: Convert to fraction form
    390,054.70/583,915.65 = 366,985.90/x
  3. Step 3: Cross multiply
    390,054.70x = 583,915.65 × 366,985.90
  4. Step 4: Simplify right side
    390,054.70x = 214,288,810,339.34
  5. Step 5: Solve for x
    x = 214,288,810,339.34/390,054.70
  6. Step 6: Final answer
    x = 549,381.43

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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.