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Finding the Fourth Proportional to 570,479.49, 856,149.62 and 390,133.98

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Solution

The fourth proportional to 570,479.49, 856,149.62 and 390,133.98 is: 585,495.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,479.49 : 856,149.62 = 390,133.98 : x
  2. Step 2: Convert to fraction form
    570,479.49/856,149.62 = 390,133.98/x
  3. Step 3: Cross multiply
    570,479.49x = 856,149.62 × 390,133.98
  4. Step 4: Simplify right side
    570,479.49x = 334,013,056,775.42
  5. Step 5: Solve for x
    x = 334,013,056,775.42/570,479.49
  6. Step 6: Final answer
    x = 585,495.29

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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.