Home / 563,678.40-777,925.20-309,079.20

Finding the Fourth Proportional to 563,678.40, 777,925.20 and 309,079.20

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Solution

The fourth proportional to 563,678.40, 777,925.20 and 309,079.20 is: 426,556.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,678.40 : 777,925.20 = 309,079.20 : x
  2. Step 2: Convert to fraction form
    563,678.40/777,925.20 = 309,079.20/x
  3. Step 3: Cross multiply
    563,678.40x = 777,925.20 × 309,079.20
  4. Step 4: Simplify right side
    563,678.40x = 240,440,498,475.84
  5. Step 5: Solve for x
    x = 240,440,498,475.84/563,678.40
  6. Step 6: Final answer
    x = 426,556.17

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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.