Home / 644,500.08-889,385.40-358,038.18

Finding the Fourth Proportional to 644,500.08, 889,385.40 and 358,038.18

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Solution

The fourth proportional to 644,500.08, 889,385.40 and 358,038.18 is: 494,078.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,500.08 : 889,385.40 = 358,038.18 : x
  2. Step 2: Convert to fraction form
    644,500.08/889,385.40 = 358,038.18/x
  3. Step 3: Cross multiply
    644,500.08x = 889,385.40 × 358,038.18
  4. Step 4: Simplify right side
    644,500.08x = 318,433,929,934.57
  5. Step 5: Solve for x
    x = 318,433,929,934.57/644,500.08
  6. Step 6: Final answer
    x = 494,078.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.