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Finding the Fourth Proportional to 390,038.70, 583,891.65 and 366,969.90

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Solution

The fourth proportional to 390,038.70, 583,891.65 and 366,969.90 is: 549,357.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,038.70 : 583,891.65 = 366,969.90 : x
  2. Step 2: Convert to fraction form
    390,038.70/583,891.65 = 366,969.90/x
  3. Step 3: Cross multiply
    390,038.70x = 583,891.65 × 366,969.90
  4. Step 4: Simplify right side
    390,038.70x = 214,270,660,411.34
  5. Step 5: Solve for x
    x = 214,270,660,411.34/390,038.70
  6. Step 6: Final answer
    x = 549,357.44

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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.