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Finding the Fourth Proportional to 572,490.90, 858,477.15 and 217,386.90

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Solution

The fourth proportional to 572,490.90, 858,477.15 and 217,386.90 is: 325,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,490.90 : 858,477.15 = 217,386.90 : x
  2. Step 2: Convert to fraction form
    572,490.90/858,477.15 = 217,386.90/x
  3. Step 3: Cross multiply
    572,490.90x = 858,477.15 × 217,386.90
  4. Step 4: Simplify right side
    572,490.90x = 186,621,686,359.34
  5. Step 5: Solve for x
    x = 186,621,686,359.34/572,490.90
  6. Step 6: Final answer
    x = 325,981.93

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Double scale
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Similar ratio
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1.5x scale

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.