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Finding the Fourth Proportional to 563,999.76, 778,306.32 and 309,348.72

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Solution

The fourth proportional to 563,999.76, 778,306.32 and 309,348.72 is: 426,893.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,999.76 : 778,306.32 = 309,348.72 : x
  2. Step 2: Convert to fraction form
    563,999.76/778,306.32 = 309,348.72/x
  3. Step 3: Cross multiply
    563,999.76x = 778,306.32 × 309,348.72
  4. Step 4: Simplify right side
    563,999.76x = 240,768,063,859.91
  5. Step 5: Solve for x
    x = 240,768,063,859.91/563,999.76
  6. Step 6: Final answer
    x = 426,893.91

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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.